Energy and Work (pV diagram problem)

Oct 2018
1
0
Hi there! So I've never taken physics until now (first year in uni) so I'm struggling to say the least. I'm trying to do this problem of a pV diagram and I'm stuck on b). I've done a) and c). I'm just confused how to find Vc in an isothermal process because if it was adiabatic then I could use the adiabatic law with gamma. See the attached files for the question and my work :)
 

Attachments

Oct 2017
610
312
Glasgow
For isothermal expansion:

\(\displaystyle P_1 V_1 = P_2 V_2\)

We know that \(\displaystyle P_1 = 3 P_2\), so

\(\displaystyle V_2 = 3 V_1 = 3 \times 0.004 = 0.012 m^3\)
 
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