A certain heat engine does 10.2 kJ of work and 9.5 kJ of heat is transfered to the environment in a cyclical process.
Given: W = 10.2 kJ
Qc = 9.5 kJ
Q1) What was the heat transfer into this engine in kJ?
Dealta U=?
q2) What was the engine's efficiency in percent?
Eff=?