A sample that contains 4.78 mol of a gas at 251 K has a pressure of 1.19 atm. What is the volume? Answer in units of L.

V = 81.86 L

Solution:

Data Given;

P = 1.19 atm

n = 4.78 mol

T = 251 K

Let suppose the gas is acting ideally, then according to Ideal Gas Equation,

P V = n R T

Solving for V,

V = n R T / P

Putting Values,

V = (4.78 mol * 0.0812 L. atm. mol⁻¹. K⁻¹ * 251 K) : 1.19 atm

V = 81.86 L