Calculating Work and Efficiency of an Aircraft Engine | Heat Engines Homework

AI Thread Summary
The mechanical work output of the aircraft engine during one cycle is calculated to be 2600 Joules, derived from the difference between the heat intake and the heat discarded. The thermal efficiency of the engine is determined to be 28.9%, calculated by dividing the work output by the heat input and converting it to a percentage. These calculations demonstrate the engine's performance in converting thermal energy into mechanical work. The results align with the principles of heat engine efficiency. Overall, the engine operates with a notable efficiency given the input and output values.
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Homework Statement


An aircraft engine akes in 9000 Joules of heat and discards 6400 J each cycles a) What is the mechanical work output of the engine during one cycle? b) What is the thermal efficiency of the engine?


Homework Equations



e=W/Qh

The Attempt at a Solution



A)
Qh = 9000 J
Qh - WORK = WORKwasted
9000 J - 6400 J = W = 2600 J

B)
e = WORK / Qh
e = 2600 J / 9000 J = .2888 * 100% = 28.9%
 
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