Question

The ideal gas law is applicable at:

• A. high $T$, high $P$
• B. low $T$, high $P$
• C. low $T$, low $P$
• D. high $T$, low $P$

Answer 1

The correct option is D high $T$, low $P$

A gas behaves more like an ideal gas at higher temperatures and low pressure, as the potential energy due to intermolecular forces becomes less significant compared to the particle's kinetic energy, and the size of the molecules becomes less significant compared to the empty space between them. These conditions are nothing but the assumptions of an ideal gas.

Hence, low $P$, high $T$ is the correct answer.