Question

For an engine operating between t1oC and t2oC, the efficiency will be

Answer 1

Answer:

Maximum efficiency of an engine working between temperature T  

1  and T  2  is given by the fraction of the heat absorbed by an engine which can be converted into work is known as efficiency of the heat engine.

Mathematically,

Efficiency, η=(1   −T  2   )/T  1

Subsituting value of η=0.2,

we get 0.8T  

1  =T2  

Now subsituting value of η=0.4 and sink temperature as T  

2  −60,we get 0.6T  

1   +60=T  2

Solving both we get T  

1  =300K and T  

2 =240K

Explanation:

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