A heat engine absorbs 848 J of energy per
cycle from a high-temperature source. The
engine does 417 J of work during each cycle,
expelling 431 J as heat.
What is the engine’s efficiency?
engine’s efficiency=A/Q =417/848=0.49
or 49%
To find the efficiency of a heat engine, you can use the formula for efficiency:
Efficiency = (Work output / Heat input) * 100%
In this case, the work output is given as 417 J and the heat input is given as 848 J. Plugging these values into the formula, we get:
Efficiency = (417 J / 848 J) * 100%
Now we can calculate the result:
Efficiency = (0.491 * 100%)
Efficiency = 49.1%
Therefore, the engine's efficiency is 49.1%.