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The molar specific heat at constant pres...

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

A

`7/5`

B

`8/7`

C

`5/7`

D

`9/7`

Text Solution

Verified by Experts

The correct Answer is:
A
`C_(p)=7/2R" "becauseC_(p)-C_(v)=R`
`thereforeC_(v)=C_(p)-R=5/2R`
`thereforegamma=C_(p)/C_(v)=(7//2R)/(5//2R)=7/5`
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