Agasoline engine with efficiency 25% delivers 1500 j of mechanical work per cycle. how much heat does this engine discard per cycle? (a) 6000 (b) 7500j (c) 4500j (d) 375 (e) 2000

(C) 4500J

Explanation:

η = Efficiency of the gasoline engine = 25% = 0.25

W = mechanical work done by engine per cycle = 1500 J

E = Total input heat

mechanical work done by engine per cycle is given as

W = η E

1500 = (0.25) E

E = 6000 J

U = heat discarded by the engine per cycle is given as

U = E - W

U = 6000 - 1500

U = 4500 J

answer( sicar );