Question

A real gas behaves like an ideal gas, at:

• A. low pressure
• B. high amount of matter
• C. high temperature
• D. (a) and (c) above.

Answer 1

The correct option is D (a) and (c) above.

In reality, no gas is ideal. The molecules of any gas will have a certain amount of interaction among them. But, these interactions are weaker when the pressure is low or the temperature is high because the interatomic or intermolecular forces of attraction are weak in an ideal gas. Hence, a real gas at low pressure or high temperature can behave like a perfect (ideal) gas.