Liquids By:MaKenzie,Lei-Lani,Isis & Noah

Definition: Liquids: have a definite volume and takes the shape of a container. Fluid: a substance that can flow and therefore take the shape of its container. Capillary action: the attraction of the surface of a liquid to the surface of a solid Vaporation: the process by which a liquid or solid changes to a gas Evaporation: the process by which particles escape from the surface of a non boiling liquid and enter the gas state Freezing(solidification): a physical change of a liquid to a solid by removal of energy at heat

Facts: Least common state of matter Particles are not bound together in fixed positions Referred to as fluids Liquids can flow Liquids flow mostly downhill, however some flow uphill. Liquid Helium can flow uphill near absolute zero.

Properties of liquids: ● Particles in a liquid are in constant motion ● Particles are closely packed together ● Liquids have a stronger intermolecular force and a lower mobility than a gas

Relatively High Density: At normal atmospheric pressure, the liquid state is less dense the the gaseous state ● It's about 10% less dense ● Liquids at the same temperature and pressure can have different densities. Theses densities differ so much that liquids start to form layers

Ability to Diffuse: ● Liquids diffuse and mix with other liquids. They gradually diffuse throughout any other liquid which it can dissolve. ● Diffusion is much slower in liquids because the particles are closer together. ● If the temperature is increase in a liquid it with diffuse faster.

Surface Tension: ● Surface tension results from the attraction between forces in particles in a liquid. ● Water has the highest surface tension most of the time ● The hydrogen bonds can form together with the other water molecules beneath and beside them but not above them ● which results with the surface water molecules being drawn together and towards the body of liquid.

Formation of Solids: As a liquid is cooled the average energy of its particles decrease When energy gets low enough the attractive forces pull the particles into a more orderly arrangement. The substance is now a solid The most known example of freezing is the changing of liquid water to solid water(ice) at 0 degrees C

Questions: 1) What is the least common state of matter? a) Gas b) Plasma c) Liquid d) Solid 2) How much more dense is a gas then a liquid a) 20% b) 90% c) 10% d) 6% 3) True or False: Liquids diffuse faster than gases 4) Fluid: _________________________________________

Answer Key 1) C 2) C 3) FALSE 4) a substance that can flow and therefore take the shape of its container.