A 112 hp car engine operates at 11% efficiency. Assume the engine's water temperature of 85°C is its cold-temperature (exhaust) reservoir and 445°C is its thermal "intake" temperature (the temperature of the exploding gas-air mixture).
(a) What is the ratio of its efficiency relative to its maximum possible (Carnot) efficiency?
eactual / eCarnot =
(b) Calculate how much power (in watts) goes into moving the car.
(c) Calculate how much heat, in joules and in kcal, is exhausted to the air in 1.0 h
For a) eideal=1-(TL/TH)
For b) (hp)(W)
For c) I need help
The Attempt at a Solution
I got the answers for a and b.
I have no clue how to do c. I need some guidance.