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Two friends want to increase the temperature of a gas without adding heat to it. Is it possible to increase the temperature of a gas without adding heat to it?

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Yes, during adiabatic compression the temperature of a gas increase while no heat is given to it.

In adiabatic compression,

dQ = 0

∴ From first law of thermodynamics

dU = dQ – dW

dU = −dW

In compression work is done on the gas i.e., work done is negative. Therefore,

dU = +ve.

Hence, internal energy of the gas increases due to which its temperature increases.

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