An expansion of gas by a system means that the internal energy of the system increases.

Question

Quizplus · Accepted Answer

An expansion of gas by a system means that the gas is performing work on its surroundings, which results in the decrease of the internal energy of the system. This is a manifestation of the First Law of Thermodynamics, which states that the change in internal energy of a system is given by the sum of the heat exchanged and the work performed on it.

An Expansion of Gas by a System Means That the Internal