in a steam engine the boiler temp is at 170 degrees Celsius and the cold temp is

Question

in a steam engine the boiler temp is at 170 degrees Celsius and the cold temp is at 25 degrees Celsius. find the maximum efficiency that this engine can attain and b. in time over which the engine removes 10kJ of heat from the boiler what is the maximum energy that must be discharged into the cold temp in a steam engine the boiler temp is at 170 degrees Celsius and the cold temp is at 25 degrees Celsius. find the maximum efficiency that this engine can attain and b. in time over which the engine removes 10kJ of heat from the boiler what is the maximum energy that must be discharged into the cold temp

Explanation / Answer

Assuming it is acarnot engine ,the efficiency is given by

efficiency = 1 - Tc /Th = 1 - ( 25+273) / ( 170+273)

efficiency = 32%

Thus, the minimum heat input is

Qh greater than 10/ 0.32 = 31.25

and, thus, Qc greater than 31.25 - 10 = 21.25

Qc min = 21.25 Kcal

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