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  • The molar specific heat at constant pressure of an ideal gas is .The ratio o

The molar specific heat at constant pressure of an ideal gas is \mathrm{(7 / 2) R}.The ratio of specific heat at constant pressure to that at constant volume is

Option: 1

7 / 5


Option: 2

8 / 7


Option: 3

5 / 7


Option: 4

9 / 7


Answers (1)

best_answer

We have given molar specific heat at constant pressure,
\mathrm{C_{p}=\frac{7}{2} R}

Mayer's relation is
\mathrm{C_{V}=C_{p}-R=\frac{5}{2} R}

Hence, required ratio is
\mathrm{\gamma=\frac{C_{p}}{C_{V}}=\frac{\left(\frac{7}{2}\right) R}{\left(\frac{5}{2}\right) R}=\frac{7}{5}}

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Ritika Jonwal

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