A Carnot engine of efficiency 41% operates with a cold reservoir at 24 °C and exhausts 1290 J of heat each cycle. What is the entropy change for the hot reservoir? Answer in J/K.
I keep getting the answer incorrect. Here is the work:
Efficiency = 100*(Th- Tc)/Th
41 = 100*(Th - (24+273))/Th
0.41 Th = Th - 297
Th = 297/(1-0.41)
= 503.4 K
entropy change = dQ/T = 1290/503.4
= 2.56 J/K