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

In a steam engine the pressure and volume of steam satisfy the equation PV^{1.4}=k, where k is a constant. Calculate the work done by the engine (in ft/lbs) during a cycle when the steam starts at a pressure of 100 lb/in^{2}and a volume of 400in^{3}and expands to a volume of 1100in^{3}.

2. Relevant equations

Use the fact that the work done by the gas when the volume expands from volume v_{1}to volume v_{2}is:

W=∫^{V2}_{v1}P dV

3. The attempt at a solution

As usual, getting hung up on where to start. So I tried to find k. Solving for k at the starting pressure of 100lb/in^{2}and volume of 400in^{3}I get a k=439,424.2

That # seems way high. Is the problem assuming the pressure is starting at these values (100lb/in^{2}and 400in^{3})??

Thanks

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# Homework Help: Steam Engine work application problem

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