Given a heat source of 200c and a heat sink of 20c, what is the maximum theoretical efficiency for a carnot engine? (numerical percentage out of 100 without the % symbol)

Answer : The maximum theoretical efficiency for a Carnot engine is 90.

Explanation :

Efficiency of carnot heat engine : It is the ratio of work done by the system to the system to the amount of heat transferred to the system at the higher temperature.

Formula used :

where,

= efficiency of carnot engine = ?

= heat supplied by hot source = 200 C

= heat supplied by cold source  = 20 C

Now put all the given values in this formula, we get :

Therefore, the maximum theoretical efficiency for a Carnot engine is 90.