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A heat engine uses thermal energy flowing from a heat source that is 225k to a cold sink that is 50k. What is the approximate efficiency of that heat engine?

Respuesta :

efficiency of heat engine is given as

[tex]\eta = 1 - \frac{T_2}{T_1}[/tex]

now we know that

[tex]T_2[/tex] = temperature of sink

[tex]T_1[/tex] = temperature of high temperature source

now it is given that

[tex]T_2 = 50 k[/tex]

[tex]T_1 = 225 k[/tex]

now from the given equation we have

[tex]\eta = 1 - \frac{50}{225}[/tex]

[tex]\eta = 0.78[/tex]

so efficiency of heat engine will be 78%

Answer:

C) 78%

Explanation:

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