Question

Calculate the efficiency of a Carnot Engine working between temperature of 1200°C and 200°C.

Answer 1

efficiency = 0.678

Step-by-step explanation:

First we have to change temperatures from °C to K (always in thermodynamics absolute temperature is used).

`\text{hot body temperature,}T_H = 1200 \circC + 273.15 = 1473.15 K`

`\text{cold body temperature,} T_C = 200 \circC + 273.15 = 473.15 K`

Efficiency
`\eta` of a carnot engine can be calculated only with hot body and cold body temperature by

`\eta = 1 - (T_C)/(T_H)`

`\eta = 1 - (473.15 K)/(1473.15 K)`

`\eta = 0.678`