Question

The total internal energy of one mole of rigid diatomic gas is

• A. $\frac{3}{2}$ RT
• B. $\frac{7}{2}$ RT
• C. $\frac{5}{2}$ RT
• D. $\frac{9}{2}$ RT
• E. $\frac{1}{2}$ RT

Answer 1

Answer: (A)

$\frac{1}{2}M\times \frac{3RT}{M}$
$\frac{3}{2}RT$
for $1$ mole of gas mole cules $(KE)=\frac{3}{2}RT$