Ppt on surface tension of water

11.3 Properties of Liquids By: Mira Amin, Katie Blackburn, Neil Marfatia.

that bind similar molecules to one another –Ex: hydrogen bonding in water Adhesive forces – intermolecular forces that bind a substance to a surface –Ex: formation of a meniscus Capillary action – rise of liquids up very narrow tubes –Helps water and dissolved nutrients travel upward through plants Capillary Action Chapter Questions 1) How do viscosity and surface tension of liquids change as intermolecular forces become stronger? –b) as temperature/


Contact Angles in the Study of Adhesion. Surface tension in Action.

meniscus with it. Because of bouyancy a large volume of water is raised above the interface and quite a deep layer of alkane is needed to contain it; the correction factor is now larger than in measuring surface tension of liquids. Measurement of Interfacial Tension Interfacial Tension Between Two Non-polar Liquids Measurement of Interfacial Tension Interfacial Tension Between Two Polar Liquids – The surface tension of a polar liquid is the sum of dispersive and polar components/


The Biology of water… Why are the unique properties of water so essential to life? Why are the unique properties of water so essential to life? How does.

force necessary to stretch or break the surface of a liquid It is a measure of the force necessary to stretch or break the surface of a liquid Related to cohesion Related to cohesion Several effects of surface tension are evident with water Several effects of surface tension are evident with water Water has a relatively high surface tension Water has a relatively high surface tension Let’s watch cohesion, adhesion and surface tension in action! 1. Filling up a penny/


Techniques for Polymer Modification Behzad Pourabbas Sahand University of Technology Tabriz-Iran 1.

 Polar liquids, such as water, have strong intermolecular interactions and thus high surface tensions.  Any factor which decreases the strength of this interaction will lower surface tension.  Thus an increase in the temperature of this system will lower surface tension.  Any contamination, especially by surfactants, will lower surface tension. http://www.ksvinc.com/surface_tension.htm Surface Free Energy Surface Energetics The unfavorable contribution to the total (surface) free energy may be minimized/


Water and Aqueous Systems” “Aqua” Latin = water.

are attracted to one another. l This gives water: high surface tension, low vapor pressure, high specific heat, high heat of vaporization, and high boiling point High Surface Tension l liquid water acts like it has a skin –glass of water bulges over the top l Water forms round drops –spray water on greasy surface l All because water hydrogen bonds Surface Tension l One water molecule hydrogen bonds to another. l Also, hydrogen bonding occurs/


Soil Water (Vadose Zone) Infiltration - movement of water from soil surface to soil Capillary rise - movement from saturated zone upwards into unsat zone.

potential as Ψ In unsaturated soils, water is held to grains by surface-tension forces and p and Ψ will always be negative tension inversely proportional to the radius of capillary tubes (pores) and proportional to the radius of curvature of menisci therefore tension increases as soils get drier, and tension is higher in silty soils than in sandy soils h c = 2 σcosλ/ρgr σ is surface tension of fluid r is the radius/


Soil physics Magnus Persson. Surface tension   2·R·cos  R 2·r P1P1 P2P2 z Due to surface tension water can be held at negative pressure in capillary.

·R·cos  R 2·r P1P1 P2P2 z Due to surface tension water can be held at negative pressure in capillary tubes. (P 1 3600Extremely water repellent How to account for variability  Dual porosity models (e.g., MACRO)  Stream tube models  Stochastic models  Fractal models Fractal models  One model capable of generating fractal clusters i the DLA model. Diffusion limited aggregation conceptually describes the growth/


WATER-The Substance of Life Limits Kinds and Amounts of Vegetation on Earth Limits Growth of Cities and Kinds of Industry رابطه آب خاك و گیاه تكميلی حاج.

to move it when it is completely submersed.molecules at the surface Surface TensionSurface tension is typically measured in dynes/cm. The force in dynes required to break a film of length 1 cm  Equivalently, it can be stated as surface energy in ergs/cm 2  Water at 20°C has a surface tension of 72.8 dynes/cm compared to 22.3 for ethyl alcohol and 465 for mercury/


Chapter 6. The surface phenomenon of liquid Applications to life science.

substance.) Some solutes can decrease surface tension of solution and some can increase surface tension. The former is called surface-active agent ( 表面活 性物质 ) and the latter is called non-surface- active agent. ( solution = solute + solvent ) The surface-active agent is called surfactant ( 表面活性剂 ) or a wetting agent. For example, organic acid (有机酸) and soap are active agent of water; salt and gluside ( 糖精 ) are non-active agent of water. When the surface-active agent dissolves ( 溶解 ) in solvent/


Soil Water Reading: Applied Hydrology Sections 4.1 and 4.2 Topics –Soil water properties –Soil water measurement –Soil water balance.

velocity through the area Definitions solid Pore with air Pore with water Element of soil, V (Saturated) Element of soil, V (Unsaturated) Continuity Equation y z x dy dz dx Continuity (Cont.) Continuity Equation Surface Tension Below surface, forces act equally in all directions At surface, some forces are missing, pulls molecules down and exert tension on the surface If interface is curved, higher pressure will exist on concave/


The Islamic University of Gaza Faculty of Engineering Civil Engineering Department Hydraulics - ECIV 3322 Chapter 1 Fundamental Properties of Water.

content and, hence, the surface tension. Organic matter (such as soap) decreases the surface tension in water and permits the formation of bubbles. The surface tension of pure water is listed in Table 1.4. The weight of the fluid is balanced with the vertical force caused by surface tension. The very small volume of liquid above (or below) the base of the curved meniscus is neglected Elasticity of Water Under ordinary conditions, water is commonly assumed to/


Textbook Fundamentals of Hydraulic Engineering Systems By Ned Hwang & Robert Houghtalen CE 351 –Hydraulic- Spring 2007

. Its value depends on the temperature and the electrolytic content of the liquid. Small amounts of salt dissolved in water tend to increase the electrolytic content and, hence, the surface tension. Organic matter (such as soap) decreases the surface tension in water and permits the formation of bubbles. The surface tension of pure water is listed in Table 1.4. Elasticity of Water Under ordinary conditions, water is commonly assumed to be incompressible. In reality, it/


Chap. 9 Surface Thermodynamics and Nucleation of Water Droplets and Ice Crystals.

. condensation considered previously. The latent heating is greater. The same theory described for the case of water applies here. Precise values of the interfacial tension of ice against water do not exist. This value is greater than that of the surface tension of water. If realistic values are used, we find that even at low temperatures of -60  C that the critical concentrations are zero (and less than that for vapor-liquid/


Chapter 15 “Water and Aqueous Systems”. Section 15.1 Water and it’s Properties l OBJECTIVES: –Explain the high surface tension and low vapor pressure.

gives water: a) its high surface tension, and b) its low vapor pressure. a) High Surface Tension? l liquid water acts like it has a “skin” –glass of water bulges over the top l Water forms round drops –spray water on greasy surface l All because water hydrogen bonds. l Fig. 15.4, p.447 – how does this insect walk on the water? (see next slide) Due to the high Surface Tension of water! Surface Tension l One water molecule/


Chapter 24 Lecture Conceptual Integrated Science Second Edition © 2013 Pearson Education, Inc. Earths Surface—Land and Water.

a convergent plate boundary. –Rock masses are pushed together. Tensional stress occurs at a divergent plate boundary. –Rock masses/water vapor. © 2013 Pearson Education, Inc. Surface Water Surface water includes streams, rivers, lakes, and reservoirs. Infiltration of water is controlled by: –Intensity and duration of precipitation –Prior wetness condition of the soil –Soil type –Slope of the land –Nature of the vegetative cover © 2013 Pearson Education, Inc. Surface Water The land area that contributes water/


Determination of the Aqua Surface Tension by Determining the Biggest Vacuole Pressure 退出.

=ghx=gh K ’, apparatus constant, can be determined base on known surface tension. (Surface tension of water and ethanol liquor can be looked up on appendix) Apparatus and Reagent Measuring detector of surface tension 1 Measuring detector of surface tension 1 Abbe refractometer 1 Abbe refractometer 1 Beaker(200ml) 1 Beaker(200ml) 1 Thermostatic water bath 1 Thermostatic water bath 1 Spheric aspirator Spheric aspirator Enthanol(analytically pure) 1 Enthanol(analytically pure/


Water and Its Properties > Chapter 15: Water and Aqueous Systems 15.1 Water and its Properties.

bonding. 15.1 Water and Its Properties > Water in the Liquid State Surface Tension Surface Tension The inward force, or pull, that tends to minimize the surface area of a liquid is called surface tension. The inward force, or pull, that tends to minimize the surface area of a liquid is called surface tension. All liquids have a surface tension, but water’s surface tension is higher than most. All liquids have a surface tension, but water’s surface tension is higher than most/


Chapter 17 “Water and Aqueous Systems” Milbank High School.

to hydrogen bond gives water many special properties! l Water: high surface tension, low vapor pressure, high specific heat, high heat of vaporization, and high boiling point High Surface Tension l liquid water acts like it has a skin –glass of water bulges over the top l Water forms round drops –spray water on greasy surface l All because water hydrogen bonds. l Fig. 17.4, p.476 Surface Tension l One water molecule hydrogen bonds to/


15.1 Water and Its Properties > 1 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chapter 15 Water and Aqueous Systems 15.1.

affiliates. All Rights Reserved. The inward force, or pull, that tends to minimize the surface area of a liquid is called surface tension. All liquids have a surface tension, but water’s surface tension is higher than most. The surface tension of water tends to hold a drop of liquid in a spherical shape. Water in the Liquid State Surface Tension 15.1 Water and Its Properties > 12 Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved/


Formula: H 2 O Water is Polar: (+ / -) Only Mixes with other polar substances Solutions Capillary Action Surface Tension Energy Storage Acids/Bases Cohesion.

that all materials are distributed equally Cohesion Water is attracted to itself + + - + + - + + - Solutions Capillary Action Surface Tension Energy Storage Acids/Bases Cohesion Adhesion Hydrogen Bond Cohesion is the attraction of molecules of the same substance Surface Tension Solutions Capillary Action Surface Tension Energy Storage Acids/Bases Cohesion Adhesion Hydrogen Bond The ability of the surface of a liquid to hold lightweight objects because the force of the distributed weight is not as great/


STEM FAIR PROJECT Project title: Sticky Water Mrs. Vickerman’s Third Graders - Northview Elementary.

surface tension of water? PROJECT OVERVIEW Surface tension refers to water’s ability to “stick to itself “. Surface tension can be measured and observed by dropping water (drop by drop) on to a penny. We will observe and record how many drops of plain water and soapy water, will hold together on the penny before spilling off. The type of water with the greater number of drops will have more surface tension. RESEARCH Surface tension is a force on the surface of/


Biological importance of Osmotic pressure 29.11.12.

, and hence keeps the contact area minimum Surface Tension Water striders use surface tension to walk on the surface of pond. The surface of the water behaves like an elastic film: the insects feet cause indentations in the waters surface. Its tiny mass and geometry of its legs allow it to be supported by the high surface tension of water Surface Tension Formation of drops occurs when a mass of liquid is stretched. Water adhering to the tap gains mass until it/


Chapter 9: Solids and Fluids States of Matter  Three states of matter Normally matter is classified into one of three (four) states: solid, liquid, gas.

decrease surface tension. The surface tissue of the air sacs in the lungs contain a fluid that has a surface tension of about 0.050 N/m. As the lungs expand during inhalation, the body secretes into the tissue a substance to reduce the surface tension and it drops down to 0.005 N/m. Surface Tension, Capillary Action, and Viscous Fluid Flow  Surface of liquid Forces between like-molecules such as between water/


Chapter 15 “Water and Aqueous Systems” Pre-AP Chemistry Charles Page High School Stephen L. Cotton.

gives water: a) its high surface tension, and b) its low vapor pressure. a) High Surface Tension? l liquid water acts like it has a “skin” –glass of water bulges over the top l Water forms round drops –spray water on greasy surface l All because water hydrogen bonds. l Fig. 15.4, p.447 – how does this insect walk on the water? (see next slide) Due to the high Surface Tension of water! Surface Tension l One water molecule/


STRUCTURE & PROPERTIES OF WATER. One of very few compounds that is liquid at temperatures found on earth’s surface. One of very few compounds that is.

forcessurface tension Cohesion of water leads to surface tension Cohesion of water leads to surface tension SURFACE TENSION: The force necessary to stretch or break the surface of a liquid. * Greater in water than in most liquids. Walking on water Small insects can walk on water because their weight is not enough to penetrate the surface. Surface tension is the name we give to the cohesion of water molecules at the surface of a body of water. Capillary Action Movement of water w/in the spaces of a/


Chapter 8 Surface phenomena and dispersion system 8.1 Surface tension.

factor, for non-polar liquid, equals 2.2  10 -7 J K -1. is the heat adsorbed by unit area enlargement. Adiabatic expansion of surface area will result in temperature decrease. As temperature increases, surface tension decreases. 2) co-existing phase dependence of surface tension Surface tension of water at 20 o C contacting with different liquids. vaporiso-pentanebenzenebutanol 72.849.632.66.8 Antonow law Saturated with benzene Saturated with/


Jeopardy ViscosityFlow RateCohesionAdhesion Surface tension Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.

Answer from Surface Tension What is surface tension $200 Question from Surface Tension A stretchable toy that is comparable to surface tension $200 Answer from Surface Tension What is a trampoline $300 Question from Surface Tension A small bug that walks on water using surface tension that has specially adapted legs to walk on water. $300 Answer from Surface Tension What is a water strider $400 Question from Surface Tension Type of cleaner that breakes surface tension $400 Answer from Surface Tension What/


SLIDE 1 LECTURE 1SURFACE TENSION XII. SLIDE 2 LECTURE 1SURFACE TENSION XII ..Some insects, like water spiders walk on water surface as if they are walking.

beaker. Intermolecular forces Now let us consider a layer of oil molecules above the water surface SLIDE 4 LECTURE 1SURFACE TENSION XII F1F1 F2F2 F3F3 F 1 > F 2 > F 3 F1F1 F2F2 F3F3 SLIDE 5 LECTURE 1SURFACE TENSION XII Surface Film P P’ FRFR A FRFR C Q Q’ B R Sphere of influence Surface tension on the basis of molecular theory R = 10 –8 m SLIDE 6 LECTURE/


Chapter 10 Liquids and Solids Topics  Intermolecular forces –Dipole-dipole forces  Hydrogen bonding –London Forces  The liquid state –Surface tension.

all sides. H H O ++ ++ -- H H O ++ -- ++ Surface Tension  A water molecule in the middle of a solution is pulled in all directions. Surface Tension  This is Not true for molecules at the surface.  Molecules at the surface are only pulled down and to each side.  This holds the molecules at the surface together tightly.  This causes surface tension. Surface tension  All liquids have surface tensionwater is just higher than most others  How can/


Key Questions How can you account for the high surface tension and low vapor pressure of water? How would your relate the structure of ice to that of.

Key Questions How can you account for the high surface tension and low vapor pressure of water? How would your relate the structure of ice to that of water and water vapor? Vocabulary Surface tension Surfactant Vapor pressure Introduction Water in the liquid state… Besides just the water on the surface, water exists in huge quantities underground too! Ice vs. salt water Unique properties: High surface tension Low vapor pressure Boils easily Vaporizes/evaporates relatively easily Hydrogen Bonding/


S U R F A C E T E N S I O N INTRODUCTION. SURFACE TENSION RESULTS FROM THE COHESIVE FORCES BETWEEN LIQUID MOLECULES THE MOLECULES AT THE SURFACE DO NOT.

BETWEEN TWO DIFFERENT SUBSTANCES) TO AIR.COHESION THE NET EFFECTS IS AN INWARD FORCE AT ITS SURFACE THAT CAUSES WATER TO BEHAVE AS IF ITS SURFACE WERE COVERED WITH A STRETCHED ELASTIC MEMBRANE. SURFACE TENSION BECAUSE OF THE RELATIVELY HIGH ATTRACTION OF WATER MOLECULES FOR EACH OTHER, WATER HAS A HIGH SURFACE TENSION HAS A DIMENSION OF FORCE PER UNIT LENGTH (DYNES PER CM) OR ENERGY PER UNIT AREA ( ERGS PER SQUARE/


Guided By Dr.A.K.Dwivedi CONTENTS 1.Biophysics – Introduction 2.Units of Concentration of solution 3.Ions 4.Electrolytes and Non Electrolytes 5.Filtration.

energy with which the surface molecules closely adhere together is called surface tension. Example: Solutes alter surface tension. Inorganic salts generally rise while organic substance reduce surface tension of water. Of the later – bile salts, protein, phospholipids, oils, soaps, etc are important. Physiological importance: 1.The globular shape of an oil drop in water, of the fat precipitate in milk etc, is due to surface tension. 2.Bile salts reduce the surface tension of the fat converting it/


Chapter 17 “Water and Aqueous Systems” Mrs. Hudson Chemistry.

gives water: a) its high surface tension, and b) its low vapor pressure. a) High Surface Tension? l liquid water acts like it has a “skin” –glass of water bulges over the top l Water forms round drops –spray water on greasy surface l All because water hydrogen bonds. l Fig. 15.4, p.447 – how does this insect walk on the water? (see next slide) Due to the high Surface Tension of water! Surface Tension l One water molecule/


Rayat Shikshan Sanstha’s, Yashavantrao Chavan Institute of Science Satara Presentation on SURFACE TENSION S hri. JadhaV s. k.

. JadhaV s. k. Class- XII Physics - I SURFACE TENSION Class- XII Physics - I SURFACE TENSION Surface tension is the property by virtue of which the free surface of a liquid behave like a stretched elastic membrane under tension and tries to have minimum possible area. Examples : 1) Rain drops are spherical in shape due to surface tension 2) Insects can walk on the surface of water due to surface tension Surface Tension Surface Tension : The tangential force per unit length acting/


Chapter 15 “Water and Aqueous Systems”. The Water Molecule l Each O-H bond is highly polar, –high electronegativity of the oxygen l Water is bent, /,

to one another by dipole interactions l This hydrogen bonding gives water: a) its high surface tension, b) its low vapor pressure. High Surface Tension l liquid water acts like it has a “skin” –glass of water bulges over the top –This explains the pain of a ‘belly flop’ Surface Tension l One water molecule can hydrogen bond to another because of this electrostatic attraction. l Also, hydrogen bonding occurs with other molecules/


1. 2 Review of Water Basics 1.What is the chemical formula for water? Polarity H2OH2O Note: Hydrogen atoms and oxygen atoms are not red or white in real.

specific heat, universal solvent High Surface Tension an inward force that tends to minimize the surface area of a liquid; it causes the surface to behave as if it were a thin skin. Example: glass of water bulges over the top, water forms round drops and water on greasy surface All of this occurs because water hydrogen bonds. Surface Tension of Water metal paper clip on waterwater forms “beads” Surface Tension One water molecule hydrogen bonds to another. Also/


Humans have been classifying and using solid materials for many thousands of years. Not until recent times has the discovery of atoms and their interactions.

When you bend the branch of a tree, one side of the branch is under tension while the other is under compression. both sides of the branch are stretched. both sides of the branch are compressed. the branch is in a neutral state. Answer: A Assessment Questions When you increase the scale of an object by three times its linear size, the surface area increases by three/


States of matter 3-1 DI By: You.

the droppers and a penny See how many drops of water fit on a penny with just pure water and how many fit with soapy water Explain how surface tension explains why one type fits more drops than the other. Soapy water is more slippery and thus less surface tension. The water sticks together more, thus having more surface tension and amount of drops. Boyles and Charles LAW Watch the Boyles Law and/


TODAY: Liquids (Ch. 13).

no molecules above, so net pull is downward into the liquid – leads to minimization of surface area. Water – unusually high surface tension compared to common liquids. Soap or oil floating on water tends to get pulled out into a film entire surface, so to minimize surface area of the water. Surface tension depends on temperature: Cold water – larger surf. tension than hot, since molecules don’t move as fast, so more strongly bonded. So/


Physical Principles of Respiratory Care

bubble as two hemispheres and noting that the internal pressure which tends to push the hemispheres apart is counteracted by the surface tension acting around the circumference of the circle. Surface tension The amount of net pressure required for inflation is dictated by the surface tension and radii of the tiny balloon-like alveoli. Capillary Action A phenomenon in which a liquid in a small tube moves upward, against/


States of Matter: Liquids and Solids 11.1 Comparison of Gases, Liquids, and Solids 11.2 Phase Transitions 11.3 Phase Diagrams 11.4 Properties of Liquids:

Houghton Mifflin Company.All rights reserved. Presentation of Lecture Outlines, 11–87 Figure 11.16: Explaining Surface Tension Copyright © Houghton Mifflin Company.All rights reserved. Presentation of Lecture Outlines, 11–88 Figure 11.18: Demonstration of Surface Tension of Water Copyright © Houghton Mifflin Company.All rights reserved. Presentation of Lecture Outlines, 11–89 Figure 11.20: Comparison of the viscosities of two liquids. Photo courtesy of James Scherer. Copyright © Houghton Mifflin Company.All/


Chapter 2: Properties of Fluids

from interior molecules causes the liquid to minimize its surface area and attain a spherical shape. Surface Tension ss = F/2b The change of surface energy = W = Force  Distance =F ∆x =2b ss ∆x =ss ∆A 14:36 Surface Tension The surface tension of a substance can be changed considerably by impurities, called surfactants. For example, soaps and detergents lower the surface tension of water and enable it to penetrate through the small openings/


Intermolecular Attractions and the properties of liquids and Solids Chapter 12.

within liquid itself 18 Wetting Ex. H 2 O wets clean glass surface as it forms H–bonds to SiO 2 surface Does not wet greasy glass, because grease is nonpolar and water is very polar Only London forces Forms beads instead Surfactants Added to detergents to lower surface tension of H 2 O Now water can spread out on greasy glass 19 Surfactants (Detergents) Substances that/


CHAPTER 36 TRANSPORT IN PLANTS

the unique physical properties of water. As water transpires from the leaf, water coating the mesophyll cells replaces water lost from the air spaces. The remaining film of liquid water retreats into the pores of the cell walls, attracted by adhesion to the hydrophilic walls. Cohesive forces in the water resist an increase in the surface area of the film. Adhesion to the wall and surface tension cause the surface of the water film to form/


Summary of the three States of Matter Summary of the three States of Matter ALSO CALLED PHASES, HAPPENS BY CHANGING THE TEMPERATURE AND/OR PRESSURE OF.

attractive force between a highly electronegative atom of one molecule with the hydrogen on another molecule also containing a very electronegative atom. N, O, F are the electronegative atoms. Properties dependent on the Intermolecular Forces SURFACE TENSION: SURFACE TENSION: describes the resistance that a liquid has to an increase in its own surface area. Answers why bugs can walk on water and why green strawberry plastic baskets/


Outcomes of this lecture

sorbitan alkyl esters: Polysorbate Sorbitan alkyl esters: Spans Cocamide MEA, cocamide DEA Dodecyldimethylamine oxide Block copolymers of polyethylene glycol and polypropylene glycol: Poloxamers Polyethoxylated tallow amine (POEA). B- Multimolecular adsorption Hydrophilic colloids form multimolecular adsorption at the oil/ water interface. They have low effect on the surface tension. Their main function as emulsion stabilizers is by making coherent multi-molecular film. This film is/


Chapter 1: The Nature of Fluid. Chapter Objectives Differentiate between a gas and a liquid. Define pressure. Identify the units for the basic quantities.

this capillary action. Wicking is the term often used to describe the rise of a fluid from a liquid surface into a woven material. 1.10 Surface Tension Table 1.5 shows the surface tension of water. 1.10 Surface Tension Table 1.6 shows the surface tension of some common liquids. Surface Tension Liquid droplets behave like small spherical balloons filled with liquid, and the surface of the liquid acts like a stretched elastic membrane under/


New Investigations of Liquid Marbles Ed. Bormashenko, The Ariel University, Ariel, Israel Харьковский национальный университет имени В. Н. Каразина, Октябрь,

separated from a substrate by air pockets Janus and composite marbles could be manufactured Conclusions *Surface Tension of Liquid Marbles is of a Pronounced Hysteretic Nature *Marbles could be actuated with magnetic and electric fields *Possible applications of marbles: Micro-fluidic devices, Gas sensing Precise transport of small quantities of liquids, Revealing of water pollution, blood typing Acknowledgements The authors are grateful to Professor M. Zinigrad for his continuous/


Chapter 13.1 Objectives Demonstrate the uniqueness of water as a chemical substance. Demonstrate the uniqueness of water as a chemical substance. Model.

drops because of surface tension. Water molecules form drops because of surface tension. Surface tension is the force needed to overcome intermolecular attractions and break through the surface of a liquid or spread the liquid out. Surface tension is the force needed to overcome intermolecular attractions and break through the surface of a liquid or spread the liquid out. Water has a HIGH surface tension so it is resistant to having its surface broken. Water has a HIGH surface tension so it/


Chapter 12 – States of Matter

of molecules Surface tension Capillary action Beading Stronger intermolecular forces cause each of these to increase Surface Tension Definition: amount of energy required to stretch or increase surface of liquid by a unit area Strong intermolecular forces  high surface tension Molecules at surface pulled toward interior Surface area minimized Interior molecules pulled in all directions Surface Tension & Detergents (Surfactants) Surfactants are compounds that lower surface tension (typically of water/


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