MCQ
An enclosed one mole of a monoatomic gas is taken through a process $A$ to $B$ as shown in figure. The molar heat capacity of the gas for this process is
- A$R$
- ✓$2R$
- C$3R$
- D$4R$
✓
Answer
Correct option: B.
$2R$
b
$\mathrm{C}=\mathrm{C}_{\mathrm{v}}+\frac{\mathrm{R}}{1-\mathrm{n}}$
$\mathrm{C}=\mathrm{C}_{\mathrm{v}}+\frac{\mathrm{R}}{1-\mathrm{n}}$
in the given process
$\mathrm{P} \alpha \mathrm{V}$
$\mathrm{PV}^{-1}=\mathrm{const}$
$n=-1$
$\Rightarrow \mathrm{C}=\frac{3}{2} \mathrm{R}+\frac{\mathrm{R}}{1-(-1)}=2 \mathrm{R}$
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