During an isothermal process, how does the internal energy of gas molecules change?

Thermodynamics MCQs for PPSC, FPSC, NTS, and Pakistan government job tests. Select an option below, then read the explanation.

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Subject
Thermodynamicsmechanical-engineering-mcqs › thermodynamics
Published
26 Jan 2019
Last updated
28 May 2026

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Explanation

In an isothermal process, the temperature of the gas remains constant, which means the internal energy, dependent on temperature, does not change.

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