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Consider an ideal gas confined in an isolated closed chamber. As the gas undergoes an adiabatic expansion, the average time of collision between molecules increases as V q , where V is the volume of the gas. The value of q is - ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ = γ v p C C

1. 6 5 3 + γ
2. 6 5 3 − γ
3. 2 1 + γ
4. 2 1 − γ

Correct answer: 2 1 + γ

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