Let Q and W denote the amount of heat given to an ideal gas and the work done by it in an adiabatic process.

Question

Philoid · Accepted Answer

In an adiabatic process, we assume that there is no heat exchange between the system and surroundings.

Hence, Q = 0. Also, U = W(when Q = 0), so Q ≠ W holds.

Option (b) is incorrect because due to change in temperature, there is still a change in internal energy and from the first law of thermodynamics, ΔU = W. Hence W ≠ 0.

Option (c) is incorrect because the heat exchange is zero, but the work done in general is not zero.

Hence, the correct answers are option (a) and (d).