A gas is placed in a rigid container that does not change volume. If heat is added to the container then the Kinetic Energy of gas increases.
Kinetic Energy of gas increases on addition of heat in a container if heat is added in the closed system.
Since, the container is rigid and there is no possibility of any change in the volume.
Volume of gas increases when the temperature of system rises but since the container is rigid according to the specified condition, hence volume change is negligible.
So, addition of heat the volume of gas cannot change. So, the Kinetic energy of the gas molecules increases on addition of heat which increases its temperature thereby leading to a change in the kinetic energy.
Kinetic Energy of gas increases on increase of temperature whenever there is no scope for the change of volume.
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