A monoatomic gas at pressure $p_1$ and $V_1$ is compressed adiabatically to $\frac{1}{8}$ th its original…

A monoatomic gas at pressure $p_1$ and $V_1$ is compressed adiabatically to $\frac{1}{8}$ th its original volume. What is the final pressure of the gas?
  1. $64 \mathrm{p}_1$
  2. $\mathrm{p}_1$
  3. $16 \mathrm{p}_1$
  4. $32 \mathrm{p}_1$

Solution

$\quad \mathrm{p}_1 \mathrm{~V}_1^{5 / 3}=\mathrm{p}^{\prime}\left(\frac{\mathrm{V}_1}{8}\right)^{5 / 3}$ $\begin{aligned} p^{\prime} & =p_1(8)^{5 / 3} \\ & =p_1 \times 2^5 \\ p^{\prime} & =32 p_1 \end{aligned}$

Asked in: MHT CET Full Test 9

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