In which process all the heat supplied is converted into work done ?
Correct answer: A. isothermal
- A. isothermal
- B. isochoric
- C. isobaric
- D. isentropic
Explanation
For an ideal gas in an isothermal process, temperature and therefore internal energy remain constant, so the first law gives Q = W. Thus all heat supplied becomes work, while the likely mistake is choosing an isobaric process, where the internal energy generally changes as temperature changes.
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About First Law of Thermodynamics
The first law relates heat supplied, work done and the change in internal energy through energy conservation. Problems use sign conventions and apply the law to isothermal, adiabatic, isobaric and isochoric processes. Internal energy is a state function, while heat and work depend on the path followed.
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