Question

In which of the following processes does the internal energy of the gas remain unaffected?

• A. Isobaric process
• B. Adiabatic process
• C. Isochoric process
• D. Isothermal process

Hint:

For ideal gases: internal energy depends only on temperature, so isothermal process implies constant internal energy.

Answer 1

The Correct Option is D

Step 1: Internal energy of ideal gas.
U depends solely on temperature; constant U implies constant T.

Step 2: Identifying the process.
An isothermal process maintains constant temperature.

Step 3: Contrasting with other processes.
Isobaric, isochoric, and adiabatic processes all involve temperature changes.

Step 4: Conclusion.
Therefore, internal energy remains unchanged during an isothermal process.