Question

In thermodynamics system internal energy decreases by 100 J and 100 J work is done on the system, heat lost will be

Answer 1

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Answer 2

Answer:

From first law of thermodynamics,

ΔH=ΔE+W

ΔE=ΔH−W

Given that:-

W=+20J(Work done on the system is positive)

ΔH=100J

∴ΔE=100−20=+80J

Hence the correct answer is +80J.

I hope it is right