The molar specific heats of an ideal gas at constant pressure and volume are denoted by Cp and Cv respectively. If γ=CpCv and R is the universal gas constant, then Cv is equal to
A
(γ−1)R
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B
γR
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C
1+γ1−γ
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D
R(γ−1)
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Solution
The correct option is DR(γ−1) Using, Cp−Cv=R ⇒Cv(CpCv−1)=R (γ−1)=RCv(∵CpCv=γ) or Cv=R(γ−1)