1. Solids, Liquids, and Gases  deposition sublimation   freezing melting  boiling condensing

2. Solids Liquids High density Definite shape and volume Amorphous or Crystalline depending on structure High Density Indefinite shape, definite volume Particles move around Evaporate to create vapor pressure

3. Gases Low density Indefinite shape and volume Particles move around Diffuse & Effuse

4. Gas Laws Charles: Volume is directly related to Kelvin temperature

5. Gas Laws Boyles: Volume is inversely related to pressure

6. Gas Laws Combined: P 1 V 1 = P 2 V 2 T 1 T 2 T must be in Kelvin (  C + 273 = K) Cross out variable as needed

7. Ideal Gas Law Real gases are ideal –Except: high P and low T PV = nRT How many moles of gas are in a 5.0 L flask at 25 ºC and 3.0 atm? –R = 0.0821 L atm / mol K