Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoFirst lawMedium2 minPYQ_2020

PhysicsMediumsingle choice

Consider two ideal diatomic gases $A$ and $B$ at some temperature $T$ . Molecules of the gas $A$ are rigid, and have a mass $m$ . Molecules of the gas $B$ have an additional vibrational mode and have a mass $\frac{m}{4}$ . The ratio of the specific heats ${(C_{V}^{})}_{A} and {(C_{V}^{})}_{B}$ of gas $A$ and $B,$ respectively is:

Options:

Answer:

Solution:

Molar heat capacity of $A$ at constant volume $= \frac{5 R}{2}$
Molar heat capacity of $B$ at constant volume $= \frac{7 R}{2}$
Dividing both $\frac{{(C_{v})}_{A}}{{(C_{v})}_{B}} = \frac{5}{7}$

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:First law

⏱ 2mℹ️ Source: PYQ_2020

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