Exam-style question
Try this first
Which of the following best describes the energy transfer in an isothermal expansion of an ideal gas?.
- A.Heat is absorbed from the surroundings while doing work.
- B.Heat is released to the surroundings while doing work.
- C.No heat is exchanged, and work is done on the gas.
- D.The internal energy decreases while heat is absorbed.
Model answer
What a good answer should say
- Heat is absorbed from the surroundings while doing work.
Explanation
Why this works
During an isothermal expansion, the gas absorbs heat from the surroundings to do work, maintaining a constant temperature and internal energy.
Common mistake
No common mistake is linked to this question yet.