Thermodynamics - Result Question 36

38. The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is

(a) 26.8

(c) 12.5

(b) 20

(d) 6.25

[2018]

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Answer:

Correct Answer: 38. (a)

Solution:

  1. (a) Efficiency of ideal heat engine, η=(1T2T1)

Sink temperature, T2=100C=100+273=373K

Source temperature, T1=0C=0+273=273K

Percentage efficiency,

=(1273373)×100=(100373)×100=26.8



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