Thermodynamics Question 225

Question: The internal energy change in a system that has absorbed 2 Kcal of heat and done 500 J of work is

Options:

A) 8900 J

B) 6400 J

C) 5400 J

D) 7900 J

Show Answer

Answer:

Correct Answer: D

Solution:

[d] ΔQ=ΔU+ΔW2×103×4.2=ΔU+500

ΔU=7900J



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