Question

10.
What is the source temperature of the Carnot engine required to get 70% efficiency?
Given sink temperature = 27 °C
(1) 1000 °C
(2) 90 °C
(3) 270 °C
(4) 727 °C​

Answer 1

Answer:

727° C is the right answer

Answer 2

Explanation:

sink temperature TL=27°C=273+27=300K of efficiency of carnot engine is70%=0.7

0.7=1-300/th= Th=1000K

or

Th=1000-273=727°C