Question

Which of the following represent the suitable conditions for the liquefaction of gases?

• A. low temperature, low pressure
• B. high temperature, low pressure
• C. low temperature, high pressure
• D. high temperature, high pressure

Answer 1

The correct option is C low temperature, high pressure

Collisions that are undergone by the molecules are not perfectly elastic, and the molecules of real gases do have interactions between them, either attractive or repulsive forces. These molecular interactions become all the more important as the average kinetic energy of the molecules decreases and/or the distance between them is reduced, such as occurs with low temperatures and high pressures. This accounts for the liquefacation of real gases.