MCQ
When an ideal triatomic non-linear gas is heated at constant pressure, the fraction of the heat energy supplied which increases the internal energy of the gas is
- A$1.33$
- ✓$0.75$
- C$0.71$
- D$1.67$
✓
Answer
Correct option: B.
$0.75$
b
Heat supplied at constant pressure $=\mathrm{nC}_{\mathrm{p}} \Delta \mathrm{T}$
Heat supplied at constant pressure $=\mathrm{nC}_{\mathrm{p}} \Delta \mathrm{T}$
Change in internal energy $=\mathrm{nC}_{\mathrm{v}} \Delta \mathrm{T}$
$\therefore$ Fraction $=\frac{C_{v}}{C_{p}}=\frac{1}{\gamma}$
For a non$-$linear triatomic gas $\gamma=\frac{4}{3}$
fraction $=\frac{3}{4}$
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