Physical Properties 3.4

Demonstration Calcium plus Water Demo 3 Balloons – Helium, Air, Hydrogen

Physical Properties Physical Property: A property that can be observed without a chemical change

Appearances and Behavior Appearances are physical properties Ex. Color, Shape, State of Matter, Volume, Temperature Behaviors of some substances are physical properties Ex. Magnetism, ductility, malleability, conductivity

Physical Properties Viscosity: A substances resistance to flowing High –-----------------------------------Low A rock syrup water

Conductivity: The ability to transfer heat or electricity

Malleability: Ability to be hammered without shattering

Hardness: Harder materials scratch softer materials

Physical Properties Melting Point: The point a substance changes from a solid to a liquid

Boiling Point: The point a substance boils

Density: The ratio of mass per volume Less dense objects float on top of more dense objects

Physical Properties are used to Identify a material CSI Choose a material for a purpose Separate substances in a mixture Filtration/Sifting – separates materials based on size Distillation – separates the substances in a solution based on boiling points Magnetism

Chemical Properties Chemical Properties: Can only be observed when a substance is changing into a different substance

Chemical Properties Flammability: A materials ability to burn in oxygen

Reactivity: A materials ability to combine and react with other chemicals

Others – Toxicity, Heat of Combustion, Oxidation States, Reaction to Light

Density Practice Problems Density = Mass Volume

Practice Problem #1 What is the density of CO gas if 0.196 grams occupies a volume of 100ml?