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MHT CET 2025 (22 Apr, Shift 1) · Thermodynamic Processes

Thermodynamic Processes question from MHT CET 2025 (22 Apr, Shift 1)

Q73MHT CET 2025 · 22 APR · SHIFT 1Medium

Thermodynamic Processes

When an ideal gas $\left(\gamma = \frac{5}{3}\right)$ is heated under constant pressure, then what percentage of given heat energy will be utilised in doing external work?

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Answer: (d)

Isobaric: fraction of heat used as work $= \dfrac{W}{Q} = \dfrac{\gamma - 1}{\gamma}$ .
$\dfrac{2/3}{5/3} = \dfrac{2}{5} = 0.4$
So the answer is (d) $40\%$ .

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