Question

The average Kinetic energy of the molecules of a gas is directly proportional to the _____ temperature.

Answer 1

In order to solve this question, we are going to consider the properties of the gases and the property of kinetic energy. The properties are discussed in reference with the kinetic theory of gases and hence, the fill in the blank question is finally done by writing in the blank.

Complete step-by-step answer:
The average kinetic energy of a gas is directly proportional to the absolute temperature. The absolute temperature means the temperature which is measured from absolute zero in kelvin. All the gases at the same temperature have the same average kinetic energy.
The kinetic theory of gases is the model that helps to explain this property of the gases.
The kinetic molecular theory of gases describes this state of matter as composed of tiny particles in constant motion with a lot of distance between the particles
The theory is based on the following concepts:
The gases are made up of particles that are in constant motion.
The gas particles are constantly colliding with each other and the walls of the container.
Gas particles are small and their total volume is negligible as compared to the total volume of the container.
There are no interactive forces between the particles of a gas.

Note: Alternatively, we can directly refer to the postulate of the kinetic theory that ‘the average kinetic energy of gas particles is proportional to the absolute temperature of the gas, and all gases at the same temperature have the same average kinetic energy’ and answer the question directly.