(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

Suppose 1.0 mol of a monatomic ideal gas initially at 10L and 302K is heated at constant volume to 604K, allowed to expand isothermally to its initial pressure, and finally compressed at constant pressure to its original volume, pressure, and temperature.

(c)What is the net energy entering the system (the gas) as heat during the cycle?

(d)What is the net work done by the gas during the cycle?

(e)What is the efficiency of the cycle?

2. Relevant equations

[tex]\varepsilon = \frac{W}{Q_H}[/tex]

3. The attempt at a solution

This is a previous test that I took. I got the correct answers for parts c and d (both are 970 J), but I'm stumped for part e; I did not get the correct answser at the time, and my work makes no sense to me.

Looking at it afresh, I don't understand why the answer isn't 1: after all, doesn't W=Q_H? But I have down that the correct answer should be 0.1338

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# Homework Help: Efficiency of an Engine

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