# PHYSICAL PROPERTIES OF MATTER. What is a physical property? A physical property of matter can be observed or measured without changing the matters identity.

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PHYSICAL PROPERTIES OF MATTER

What is a physical property? A physical property of matter can be observed or measured without changing the matters identity.

PHYSICAL PROPERTIES YOU NEED TO KNOW Density Boiling Point Melting Point Freezing Point Solubility Specific Heat Magnetism Electrical Conductivity Thermal Conductivity Malleability Ductility State Shape

What is density? Density is the ratio between the mass and volume of a substance. It tells the size of the atoms and how close the atoms are to each other in a substance.

How do you solve for density? D= m/v Density can be used to identify substances Each substance has a unique density

Density AIR SUBSTANCE A SUBSTANCE B

More about density The density of a substance is the same everywhere in the universe.

LETS DO A DENSITY ACTIVITY!!!!

Boiling Point is the temperature when a liquid changes to a gas. Melting Point is the temperature when a solid changes to a liquid. Freezing Point is the temperature when a liquid changes to a solid

EVERY SUBSTANCE HAS A UNIQUE MELTING, FREEZING AND BOILING POINT!

What is solubility? Solubility The ability of a substance to dissolve in another substance. Different amounts of substances may dissolve in the same amount of water.

100 g of water Sodium chloride Sodium bromide Sodium iodide

SubstanceMelting Point Boiling Point Dissolve in water? Amount of substance dissolved in 100 g of water Sodium chloride 800.7°C1,465° C YES36 g Sodium bromide 747°C1,390° C YES94.6 g Sodium iodide 660°C1,304° C YES184 g

Starch-based packing peanuts are soluble in water, but plastic foam peanuts are not, as shown in the images below.

Lets try to solve this scientific question? How much sugar can dissolve in 10 mL of water? (write this question down on another sheet of paper)

What is specific heat? Specific Heat is the amount of ENERGY needed to change the temperature of a substance 1 degree. The higher the specific heat of something is, the more ENERGY it takes to increase its temperature.

METAL = 500 CLOTH = 1340

Specific Heat Demo

What is magnetism? Magnetism the property of some materials to attract iron or something that has iron in it.

What is electrical conductivity? Electrical Conductivity the ability to allow charges (electricity) to move through a material.

REMEMBER: Metals are usually good conductors

What is thermal conductivity? Thermal Conductivity the ability to allow heat to transfer through a substance

CONVECTION VS CONDUCTION ACTIVITY

What is malleability? Malleability the ability of a substance to be rolled or pounded into thin sheets. REMEMBER: Most metals are malleable

What is ductility? Ductility is the ability of a substance to be pulled into a wire.

What are the three states of matter? SOLID LIQUID GAS

SUBSTANCEMELTING POINT (deg C) BOILING POINT (deg C) STATE at 21 deg C Water0100 Ethanol-11779 Propane-190-42 Table Salt8011465

What is shape? Shape is the form something takes

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