Apologia chem mod 6

Deference between a Chemical change and a physical change

A Chemical change is a change that affects the type of molecules or atoms in a substance. A Physical change is a change in which atoms or molecules in a substance stay the same

What is it called when a substance changes from a solid to a liquid (or vise versa)?

phase change

Transition from solid to liquid

Melting

Liquid turning into solid

Freezing

Liquid to gas

Boiling

Gas to liquid

Condensing

Three states of mater (phases)

Solid, liquid, and gas

What is the Kinetic theory of mater?

Atoms and molecules are always in motion The higher the temperature, the greater their speed.

The temp at which a substance goes from a solid to a —> liquid

Melting point

The temp a substance goes from liquid phase to gas phase

boiling point

Density

an object’s mass divided by the volume that the object occupies

what substance is an exception to the phase change rule becoming less dense in its solid state

water

what law does an unbalanced equation break?

The law of mass conservation