Aheat engine has a temperature of 1800 k. some of the heat from the engine flows to the surroundings, which are at a temperature of 160 k. what is the approximate efficiency of the engine? a. 16% b. 91% c. 103% d. 109%

Answer : The correct option is, (b) 91 %

Solution :

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

Formula used :

where,

= efficiency of heat engine

= work done

= cold temperature = 160 K

= hot temperature = 1800 K

= input heat

Now put all the given values in the above formula, we get the efficiency of the heat engine.

Therefore, the efficiency of the heat engine is, 91 %.

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