Question

The efficiency of carnot engine working between 127° and 77° is

Answer 1

Efficiency of Carnot engine = 1 - (lower temperature/higher temperature)

127 degree Celsius = 127 + 273 = 400

77 degree Celsius = 77 + 273 = 350

so efficiency = 1 - (350/400)

= (400-350)/400

= 50/400

= 1/8

= 100/8 %

= 12.5 %