Engineering
Chemistry
First Law and Various Process
Question
During compression of a spring the work done is 10 kJ and 2 kJ escaped to the surroundings as heat. The change in internal energy, (in kJ) is:
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Solution
Work done on system = +10 kJ
Heat escaped = – 2kJ
ΔU = q + w
= 10 – 2 = 8 kJ