in Thermodynamics system internal energy decrease by 100 j and 100 j
of work done is on the system then heat lost will be
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Answered by
2
Answer:
A system is provided with 100J of heat : Work done on the system is 20J. What is the change in ΔE?
Answered by
7
Answer:
The heat lost (Q) = -200J.
Explanation:
Taking the sign conventions from the system and not from the surroundings, we have
change in internal energy (ΔU)= -100J
work done on the system (W) = +100J
Hence, using the first law of thermodynamics
The amount of energy in the universe is constant.
dU = dQ + dW
ΔU = Q + W.
Q is the heat gained by the system.
W is the work done on the system.
∴ The heat lost (Q) = -200J.
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21 MAY 2022.
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