Question

Efficiency of a heat engine between 400K and 300K is

Answer 1

see the attached file . hope it helps you ❤️

Answer 2

Answer:

• The efficiency of heat engine is given by following formula $N=1-\frac{T_2}{T_1}$

• 81 is taken as initial temperature while T2 is taken as the final temperature the values of T1 and T2 are being 400 and 350 respectively.

• Applying this values in the above given equation and simplifying,

           $1-\frac{T_2}{T_1}=1-\frac{350}{400}$

            =$\frac{50}{400}$

             =$\frac{1}{8}$

             =12.5%

• on solving this we get the value as 1/8 when converted into percentage it becomes 12.5%.