Dent energy of an ideal gas increases when it expand
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A gas expands when the constituent molecules have more energy to move around and be free from the grip of other molecules. But in order to escape the molecular bonds and be free, the molecules must have a lot of Kinetic energy. The Kinetic energy of the molecules increases with an increase in temperature. So, when the temperature increases, the constituent molecules have more Kinetic energy, and consequently, the volume of the gas increases (i.e., the gas expands). So, when a gas expands, it’s temperature must be higher than the energy required for the molecules to break free from the molecular bonds. And, this sentence explains why at the same temperature, different gases have different rates of expansion.
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