Thermodynamics - Result Question 6

6. 110 joules of heat is added to a gaseous system whose internal energy is 40J. Then the amount of external work done is

(a) 150J

(b) 70J

(c) 110J

(d) 40J

[1993]

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Answer:

Correct Answer: 6. (b)

Solution:

  1. (b) ΔQ=ΔU+ΔW

ΔW=ΔQΔU=11040=70J



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