Which of the following processes alwaysresults in an increase in the energy of a system? a)the system loses heat and does work on the surroundings. b)the system gains heat and does work on the surroundings. c)the system loses heat and has work done on it by the surroundings. d)the system gains heat and has work done on it by the surroundings. e)none of these is always true.

Option D

The system gains heat and has work done on it by the surroundings.

Explanation:

Considering that any system that processes anything leads to an increment in the energy within the system. This implies that the system has to absorb more heat either from the surrounding or external sources and the work done on the surrounding, Therefore, option D is correct by saying that the  system gains heat and has work done on it by the surroundings.

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c) both a and b.