Transcript Section 14.2

Section 14.2
The Combined Gas Law
and Avogadro’s Principle
Objectives
State the relationship among temperature, volume,
and pressure as the combined gas law.
Apply the combined gas law to problems involving
the pressure, temperature, and volume of a gas
Relate numbers of particles and volume by using
Avogadro’s principle.
Key Terms
Combined gas law
Avogadro’s principle
Molar volume
The Combined Gas Law
Boyle’s, Charles’s, and Gay-Lussac’s
States relationship among P, V, and T of a
fixed amount of gas
P is inversely proportional to V
P is directly proportional to T
V is directly proportional to T
Mathematical Equation
P1V 1 = P 2V 2
T1
T2
Practice Problems
Page 430
19-21
Avogadro’s Principle
Equal volumes of gases at the same T and P
contain equal number of particles
Avogadro, 1811
Remember the mole (6.02 x 1023)
Molar Volume
Volume that one mole occupies at STP
 0 C and 1.00 atm
Conversion factor:
22.4 L
1 mol
Practice Problems
Page 432
 24, 27
Page 433
 29-30