A car engine burns 5 kg fuel (equivalent to addition of QH) at 1500 K and rejects energy to the radiator and the exhaust at an average temperature of 750 K. If the fuel provides 40 000 kJ/kg what is the maximum amount of work the engine can provide?
A heat engine QH = m qfuel = 5 × 40000 = 200 000 kJ Assume a Carnot efficiency (maximum theoretical work)
