70 calories of heat required to raise the temperature of 2 moles of an ideal gas at constant pressure from `30^@Cto 35^@C.` The amount of heat required (in calories) to raise the temperature of the same gas through the same range `(30^@C to 35^@C)` at constant volume is:

Options

A. `30`
B. `50`
C. `70`
D. `90`

Answer

B

Explanation

(b) `(Q_2)/(Q_1)=(nC_vDeltaT)/(nC_pDeltaT)=1/gamma rArr Q_2=(Q_1)/gamma`