When heat is given to isobaric process then _.
Correct answer: C. Both a and b
- A. Work is done by the gas
- B. Internal energy of gas increases
- C. Both a and b
- D. None of them
Explanation
An isobaric process occurs at constant pressure. According to the first law of thermodynamics, the heat added to the system is used to do work and change the internal energy of the gas. Therefore, both work is done by the gas and the internal energy of the gas increases, assuming the heat added is greater than the work done. Option C is correct because it encapsulates both these effects. Option A and Option B are partially correct but do not capture the full scope of the isobaric process, while Option D is incorrect as both phenomena occur.
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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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