A system dissipates 12 J of heat into the surroundings; meanwhile, 28 J of work is done on the system. What is the change of the internal energy ΔEth of the system? A system dissipates 12 of heat into the surroundings; meanwhile, 28 of work is done on the system. What is the change of the internal energy of the system? a. - 40 J b. - 16 J c. 16 J d. 40 J

Question

Physics

Zachariah

6 October, 16:31

A system dissipates 12 J of heat into the surroundings; meanwhile, 28 J of work is done on the system. What is the change of the internal energy ΔEth of the system? A system dissipates 12 of heat into the surroundings; meanwhile, 28 of work is done on the system. What is the change of the internal energy of the system? a. - 40 J b. - 16 J c. 16 J d. 40 J

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Answers (1)

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Chandler Decker · Answer 1

option C

Explanation:

given,

energy dissipated by the system to the surrounding = 12 J

Work done on the system = 28 J

change in internal energy of the system

Δ U = Q - W

system losses energy = - 12 J

work done = - 28 J

Δ U = Q - W

Δ U = - 12 - (-28)

Δ U = 16 J

hence, the correct answer is option C