Chemistry
Intermediate

Combined Gas Law

Relates two states of a fixed amount of gas.

Formula

P1V1T1=P2V2T2\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}

Variables

PPressure
VVolume
TTemperature (K)

Example

A gas at 1 atm, 300 K, 2 L heated to 600 K at 2 atm occupies (1·2·600)/(300·2) = 2 L.

Did You Know?

The combined gas law is why a sealed bag of chips puffs up on an airplane as cabin pressure drops.

gascombinedthermodynamics