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The ammount of heat required to raise th...

The ammount of heat required to raise the temperature of 1 mole of diatomic gas by `1^(@)C` at constant pressure is `60cal` . The amount of heat which goes as internal energy of the gas is nearly.

A

`60Cal`

B

`30Cal`

C

`42.6Cal`

D

`49.8Cal`

Text Solution

Verified by Experts

The correct Answer is:
B
For a diatomic gas `C_(p)=(7)/(2)R` and `C_(v)=(5)/(2)R`
Only `(5)/(7)=0.71` of energy supplied increases the internal
energy of the gas. The rest is used to do work against external pressure
`0.71xx60=42.6cal`
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