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Question: Answered & Verified by Expert
A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume for this process is $\mathrm{TV}^{\mathrm{x}}=$ constant, then $\mathrm{x}$ is:
PhysicsThermodynamicsJEE MainJEE Main 2019 (11 Jan Shift 1)
Options:
  • A $\frac{3}{5}$
  • B $\frac{2}{5}$
  • C $\frac{2}{3}$
  • D $\frac{5}{3}$
Solution:
1699 Upvotes Verified Answer
The correct answer is: $\frac{2}{5}$
Equation of adiabatic change is

$$

\mathrm{TV}^{\gamma-1}=\text { constant }

$$

Put $\gamma=\frac{7}{5}$, we get: $\gamma-1=\frac{7}{5}-1$

$\therefore \mathrm{x}=\frac{2}{5}$

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