1. Temperature & Gas Laws
Chapter 16

2. Temperature Measured in Celsius and Kelvin
(Kelvin = Celsius + 273)
Absolute Zero: the temperature at which the volume of an ideal gas is zero (T = 0 K)
Directly related to the average KE of particles in a substance

3. Gas Laws
Boyle’s Law: the volume of a gas is inversely related to its pressure
Charles’ Law: the volume of a gas is directly related to its absolute temperature
Gay-Lussac’s Law: the pressure of a gas is directly related to its absolute temperature

4. Ideal Gas Law
Incorporates Boyles, Charles and Gay-Lussac’s Laws and includes the effect of moles of a substance:
PV = nRT
Where R = ideal gas constant
= J/kmol K

5. Ideal Gas Law Units Pressure (P) = Pascals Volume (V) = m3
Temperature (T) = Kelvin
Number of moles (n) = kmol

6. Combined Gas Law
Gas Laws can be expressed in an equation that relates initial conditions to final conditions:
P1V1 = P2V2
T T2

7. Standard Conditions Standard Temperature = 0oC (273 K)
Standard Pressure = 1 atm
= x 105 Pa

8. Practice Problems