Question

A gas is said to behave like an ideal gas when the relation PV/T = constant. When do you expect a real gas to behave like an ideal gas?

(a) When the temperature is low

(b) When both the temperature and pressure are low

(c) When both the temperature and pressure are high

(d) When the temperature is high and pressure is low

Answer 1

(d) When the temperature is high and pressure is low

Deviations of real gases from ideal behaviour become pronounced at low temperature and high pressure.