Question

A diesel engine does 350 J of work for every 1 kilojoule (kJ) of heat added to the system in one cycle. What is the efficiency of the diesel engine?

Answer 1

Answer: 35%

Step-by-step explanation:

Thermal efficiency = work / heat into system
η = |W| / |Qh| x 100%

= 350J / 1000J = 0.35 x 100% = 35%

35% of the energy is put to use; the remainder is lost as waste.