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

An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)