Question

When a gas is heated, the temperature is increased. What happens to the moment of molecules if the temperature of the gas is increased?

Answer 1

Hint: We know that the gas is compressed, the work done on it shows up as increased internal energy, which must be transferred to the surroundings to keep the temperature constant. The volume of gas increases when temperature increases and hence the molecules of gas will have more kinetic energy and the molecules will strike the container with more force.

Complete answer:
As we know that the volume of a gas is inversely proportional to pressure keeping the temperature the same. It means if you increase one entity, another will directly decrease. And if you are applying more pressure, the volume of the gas will decrease and if you are removing pressure, gas molecules will expand. Hence, when the gas is compressed, its molecules come closer and internal energy of gas is increased and the number of collisions will also increase. We know that, as the particles are moving, they have kinetic energy. The faster they move, the more kinetic energy they will have.
When a matter is hot, the particles will move faster and when it cools, the particles move more slowly. The Kinetic Molecular Theory of Gases is derived from the observations made about gases so as to explain their macroscopic properties. The basic assumptions of the Kinetic Molecular Theory are that the volume occupied by the individual particles of a gas is negligible compared to the volume of the gas itself. The particles of an ideal gas exert no attractive forces on each other or on their surroundings. Thus, if the temperature of the gas is increased the Speed of motion increases.

Note:
Remember that the average kinetic energy of gas molecules is directly proportional to absolute temperature only; this implies that all molecular motion ceases if the temperature is reduced to absolute zero.