Q.

The pressure and density of a diatomic gas γ=75 change adiabatically from (P,d) to P′,d′. If d′d=32, then the value of P′/P is ________________.

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answer is 128.

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Detailed Solution

PVγ=P′V′γPmγdγ=P′m′γd′γ⇒P′P=d′dγ=(32)7/5=128
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The pressure and density of a diatomic gas γ=75 change adiabatically from (P,d) to P′,d′. If d′d=32, then the value of P′/P is ________________.