11-04-2019
Physics

contestada

What is the change in internal energy if 20 J of heat is released from a system and the system does 50 J of work on the surroundings?
A.-80 J
B.-20 J
C.80 J
D.20 J

Respuesta :

jackspetici585 jackspetici585

18-04-2019

Answer:

C. 80 J

Explanation:

dU = dq + w

dU = -20 J + (-60 J) = -80 J

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