Exam-style question
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Explain the energy transfer that occurs during an isothermal process involving an ideal gas.
Model answer
What a good answer should say
- In an isothermal process, the temperature of the gas remains constant.
- Therefore, the internal energy of the gas does not change.
- Any heat added to the system is equal to the work done by the gas as it expands, following the first law of thermodynamics.
Explanation
Why this works
This answer demonstrates understanding of the isothermal process by linking temperature, internal energy, and work done. It tests the ability to apply the first law of thermodynamics in a specific context.
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