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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoKTGMedium2 minQB

PhysicsMediumsingle choice

A box contains N molecules of an ideal gas at absolute temp T and pressure P. The number of molecules in the box is doubled keeping the total kinetic energy of the gas the same as before. If the new pressure is $P^{'}$ and temperature $T^{'}$ then

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Solution:

$K = N \frac{f}{2} k T$ . Doubling N at the same total K gives $T^{'} = \frac{T}{2}$ . Then $P^{'} = \frac{2 N \cdot k T ^{'}}{V} =$ $\frac{N k T}{V} = P$ .

Stream:JEESubject:PhysicsTopic:Heat & ThermoSubtopic:KTG

⏱ 2mℹ️ Source: QB

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