Question

Efficiency of a Carnot engine is 20%. If temp. Of sink is decreased by 50k then it's efficiency becomes 40%.Then,calculate the initial nd final temp in which the engine operates

Answer 1

Answer:

Explanation:

We know the formula for efficiency A=1-T2/T1

Let take intial tempT1= x

Final temp T2=y

After decreased by 50%

The initial temp T1=x-50

And the final temp T2=y-50

O.2=1-Y/x

0.2-1=-y/x

0.8x+y=0 be eq 1

After decreased

O.6x-y+20=0 be eq 2

From eq 1 and 2

X=1.42 and y =19.48