Sorry about the double post, I had technical difficulties that I was working on and the title of my orginal post got screwed up.(adsbygoogle = window.adsbygoogle || []).push({});

I'm having problems getting started on this one.

A gas undergoes a thermodynamic cycle consisting of 3 processes

process 1-2 compression with pressure(p)*volume(V) = constant, from

[tex]p_{1} = 1 bar[/tex]

[tex]V_{1} = 1.6m^3[/tex]

to

[tex]p_{2} = ?[/tex]

[tex]V_{1} = .2m^3[/tex]

[tex]U_{2}-U_{1}=0[/tex]

process 2-3

Constant pressure to [tex]V_{3}=V_{1}[/tex]

process 3-1

Constant Volume, [tex]U_{1}-U_{3} = -3549kJ[/tex]

There are no significant changes in kinetic or potential energy.

Determine the heat transfer and work for process 2-3 in kJ.

I don't have any problems finding[tex]p_{2}[/tex] or the work needed to compress the gas, but I'm not really sure where to go from there.

[tex]p_2=\frac{p_1V_1}{V_2}[/tex]

[tex]W=\int p dV[/tex]

When I work these out, I end up with 333kJ for W and 8 bar for p2.

If someone could give me a quick push in the right direction, that would be great.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Thermodynamic cycle

**Physics Forums | Science Articles, Homework Help, Discussion**