Homework Help: Physics

Posted by Jon on Friday, December 9, 2011 at 6:13pm.

A reversible heat engine operates between thermal reservoirs at 1000 K and 290 K. If 8610 J is extracted from the hot reservoir, how much work is done by the heat engine?

Physics - bobpursley, Friday, December 9, 2011 at 6:27pm
8610 (1000-290)/1000= what
Physics - Mrs.Smooch, Friday, December 9, 2011 at 6:29pm
į = 1 - 290K/1000K = 0.29 = 29.0%

The thermal efficiency is defined as the amount of work done per amount of heat absorbed from hot reservoir or...
į = W/Qh

so then you would just use
W = e*Qh

and plug in what you know
Physics - bobpursley, Friday, December 9, 2011 at 6:31pm
Hannah, reread the question. My response is correct. It does not ask for thermalefficiency.

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