STANDARD Physics First Law of Thermodynamics MCQ Question
The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is
2/5
2/3
1/3
2/7
Correct Answer
Detailed Explanation
In an isobaric process, the work done W = PΔV = nRΔT and the heat absorbed Q = nCₚΔT. For a monatomic gas, Cₚ = 5R/2. Therefore, the ratio W/ΔQ = (nRΔT)/(nCₚΔT) = 2/5.
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