Question

The specific heat of 1 mole of an ideal gas at constant pressure $(C_{P})$ and at constant volume $(C_{V})$ which is correct

• A. $C_{P}$ of hydrogen gas is $\frac{5}{2}R$
• B. $C_{V}$ of hydrogen gas is $\frac{7}{2}R$
• C. $H_{2}$ has very small values of $C_{p}$ and $C_{V}$
• D. $C_{p}$ – $C_{v}$ = 1.99 cal/mole-K for $H_{2}$

Answer 1

Answer: (D)

$C_{p}$ – $C_{v}$ = 1.99 cal/mole-K for $H_{2}$

Answer 2

For any gas

$C_{P} - C_{V} = 1.99 \approx 2\frac{cal}{mol - K}$