Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: PV Diagrams

  1. Jan 9, 2009 #1
    Draw the path in the pV diagram for an isobaric expansion from a volume of 2 m^3 to 5 m^3.



    Idk which of these equations are needed cuz they all are given with this section...
    ΔU=Q-W
    ΔU=Q+W
    W=PΔV
    ΔU=Q
    W=nRTln(Vf/Vi)
    Q-W
    ΔU=-W
    ΔU=+W
    e=W/Qh=1-Qc/Qh
    e=1-Tc/Th
    ΔS=Q/T




    My attempt...

    Graph with x being Volume and y being Pressure, a horizontal line from 2-5
     
  2. jcsd
  3. Jan 9, 2009 #2
    An isobaric expansion means that the pressure is kept constant during the expansion. This means that when you graph the expansion on the pV diagram, you will have a line parallel to the V axis.
    So what you did was right...
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook