Question

Is it possible to increase the temperature of a gas without adding heat to it? Explain.

Answer 1

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

In adiabatic compression, dQ = 0

∴ From the 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 = Positive

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