Exam-style question
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Which of the following best describes the energy transfer in an isothermal process?.
- A.Temperature remains constant while internal energy changes.
- B.Temperature and internal energy both increase.
- C.Temperature remains constant while heat is absorbed or released.
- D.Internal energy remains constant while work is done.
Model answer
What a good answer should say
- Temperature remains constant while heat is absorbed or released.
Explanation
Why this works
In an isothermal process, the temperature of the system remains constant. This means that any heat absorbed or released by the system is balanced by work done on or by the system, keeping the internal energy constant.
Common mistake
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