Question

Under which conditions does the molar volume of a gas decrease? A. at 273 K and at 2.0 atm. B. at 273 K and at 0.5 atm. C. at 409.5 K and at 1.0 atm. D. at 546 K and at 2.0 atm

Answer 1

A. at 273 K and at 2.0 atm

Explanation:

Answer 2

We first assume that this gas is an ideal gas and we use the ideal gas equation to determine the answer. It is expressed as:

PV = nRT

Molar volume can be obtained from the equation by V/n.

V/n = RT/P

Therefore, the correct answer from the choices listed above is option A, at 273 K and at 2.0 atm.