Question #98403

1 Answer
qin
Apr 28, 2017

-393 cal/mol

Explanation:

The change in internal energy is equal to the sum of the work done on the system and the heat supplied to the system. In other words,
#Delta U= W+Q#.

Since the system does work on another system, W is negative. Also, the system loses heat to the surroundings, resulting in a negative Q too.

Therefore, #Delta U# is -134-259 = -393 cal/mol.

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