How do you calculate the molar volume of a gas at STP?

1 Answer
May 25, 2014

The Molar Volume of a gas at STP is a constant using Avogadro's value of 22.4 L/mol.

To calculate this we can use the Ideal gas law of PV=nRTPV=nRT

At STP (Standard Temperature and Pressure)
P = 1 atm
V = ?
n = 1 mol
R = 0.0821 (atmL)/(molK)atmLmolK
T = 273 K

(1 atm)(V) = (1 mol) (0.0821 (atmL)/(molK))(273K)(1atm)(V)=(1mol)(0.0821atmLmolK)(273K)

V= ((1 mol) (0.0821 (atmL)/(molK))(273K))/(1 atm)V=(1mol)(0.0821atmLmolK)(273K)1atm

V= 22.4 L/molV=22.4Lmol

I hope this was helpful.
SMARTERTEACHER