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MHT CET 2025 (19 Apr, Shift 1) · Specific Heats of Gases - Cp, Cv, γ & Mayer's Relation

Specific Heats of Gases - Cp, Cv, γ & Mayer's Relation question from MHT CET 2025 (19 Apr, Shift 1)

Q10MHT CET 2025 · 19 APR · SHIFT 1Medium

Specific Heats of Gases - Cp, Cv, γ & Mayer's Relation

The molar specific heat of an ideal gas at constant pressure and constant volume is ' CpC_p ' and ' CvC_v ' respectively. If ' R ' is a universal gas constant and the ratio of ' CpC_p ' to ' CvC_v ' is γ\gamma, then ' CpC_p ' is equal to

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Answer: (c)

  1. Cp−Cv=RC_p - C_v = R and Cv=CpγC_v = \dfrac{C_p}{\gamma}.
  2. Cp(1−1γ)=R⇒Cp=Rγγ−1C_p\left(1 - \dfrac{1}{\gamma}\right) = R \Rightarrow C_p = \dfrac{R\gamma}{\gamma - 1}
  3. So the answer is (c) Rγγ−1\dfrac{R\gamma}{\gamma-1}.
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