Exam-style question
Try this first
Which of the following is an example of a non-flow thermodynamic process?.
- A.Heating water in an open pot.
- B.Compressing gas in a piston.
- C.Cooling air in a refrigerator.
- D.Burning fuel in an engine.
Model answer
What a good answer should say
- Compressing gas in a piston.
Explanation
Why this works
Compressing gas in a piston is a non-flow process because the gas is contained and does not exchange matter with the surroundings, only work is done on the gas.
Common mistake
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