1. Ideal Gas Law
Thursday, April 5th, 2018

2. PV = nRT The Ideal Gas Law T = Temperature (in K) n = moles
P = Pressure (in atm) V = Volume (in L)
T = Temperature (in K) n = moles
R = L • atm
K • mol
R is constant. If we are given three of P, V, n, or T, we can solve for the unknown value.

3. How many moles of H2 is in a 3. 1 L sample of H2 measured at 3
How many moles of H2 is in a 3.1 L sample of H2 measured at 3.00 atm and 22°C?

4. How many moles of H2 is in a 3. 1 L sample of H2 measured at 3
How many moles of H2 is in a 3.1 L sample of H2 measured at 3.00 atm and 22°C?
PV = nRT
(3.00 atm)(3.1 L) = n ( Latm/molK) ( K)
n = (3.00 atm)(3.1 L)
( Latm/molK) (295 K)
n = 0.38 mol

6. Things to Remember Check your units! Volume must be in L
Pressure must be in atm
TEMPERATURE MUST BE IN K!
grams  moles (But how?!)
Things to Remember