May 28, 2016

Homework Help: Physics 102 (College)

Posted by Carla on Sunday, February 27, 2011 at 2:46pm.

I'm stuck on part B of this question:

A system does 125 J of work on environment and gains 79 J of heat in the process. Find change in internal energy (delta U, abbreviated dU)of
a. the system and b. the environment.

A. Find dU of the system
W = 125 J
Q = 79 J
dU = Q - W
dU = (79 J - 125 J) = -46.0 J

B. find dU of the environment

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