Questions
The internal energy change in a system that has absorbed 2 k cals of heat and done 500 J of work is :
a
7900 J
b
8900 J
c
6400 J
d
5400 J
detailed solution
Correct option is A
Q=W+∆U ⇒ W=Q-∆U =2×1000×4.2-500=7900 JTalk to our academic expert!
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540 calories of heat convert l cc of water at 100°C to 1671 cc of steam at 100°C under atmospheric conditions. Increase in internal energy will be nearly:
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