Acarnot engineoperates between a heat source at
1200 f and a heat sink at 70 f. the engine delivers 200 hp. compute
the heat supplied (btu/s), theheat rejected (btu/s), and the
thermal efficiency of the heatengine.

Heat supplied = 208.82 BTU/s

Heat rejected  =  66.82 BTU/s

Carnot thermal efficiency = 0.68

Explanation:

Data  

Hot temperature, = 1200 F + 459.67 = 1659.67 R

Cold temperature, = 70 F + 459.67 = 529.67 R

Engine power,  

Carnot thermal efficiency is computed by

Efficiency is by definition

where is the heat supplied

Energy balance in the engine  

where is the heat rejected