A heat engine absorbs 923 J of energy per cycle from a high-temperature source.What is the engine’s efficiency?

Question by needhelpplzzzzz: A heat engine absorbs 923 J of energy per cycle from a high-temperature source.What is the engine’s efficiency?
A heat engine absorbs 923 J of energy per cycle from a high-temperature source. The engine does 416 J of work during each cycle, expelling 507 J as heat. What is the engine’s efficiency?

If there was no work done on the engine i know i would do 1-(507/923), but I am not sure how to do this type of problem so please help me.

Best answer:

Answer by Stephanie
Efficiency=Energyout/Energyin
so
you are giving off 507 J of heat (which is a form of energy) this is your energy out
you are using 923 J of energy this is your energy in

plug these into your equation….

507/923 to get .5492957746 or 55% efficiency.
I’m not sure why they also give you the work… I do know Wout/Win is also an equation for efficiency.

What do you think? Answer below!

Leave a Reply

Your email address will not be published. Required fields are marked *

Categories