A certain gas process ends in its original thermodynamics state. Of the following, which is possible as the net result of the process?

The gas does no work but loses 50 joule of energy as heat

The gas absorbs 50 J of energy as heat and does 50 J of work

It is adiabatic and the gas does 50 J of work

None of these

Since ΔU = 0 for a cyclic process, Q = W.

The gas absorbs 50 J of energy as heat and does 50 J of work, where Q = W = 50 J.

The best answer is The gas absorbs 50 J of energy as heat and does 50 J of work.