Question

The molar specific heat of hydrogen at constant volume is $5cal/mo{l}^{o}C$ . Heat required to raise the temperature of 1 gm $H_2$ gas by ${10}^{o}C$ at constant volume is

• A. 20 cal
• B. 22 cal
• C. 25 cal
• D. 40 cal

Answer 1

Answer: (C)

25 cal

We know that, $\Delta Q=n{C}_v\Delta T$
Here,$\Delta T=10K,n=\frac{m}{M}=\frac{1}{2}=0.5,C_v=5cal/mol-K$
Putting these values in above equation we get,
$\Delta Q=25cal$