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Carnot cycle graphs

  1. Apr 9, 2013 #1
    Hello,

    In the Volume vs. pressure graph I understand the area under the curve is work. However, I have a hard time reconciling this graph with a pressure vs. temperature or a temperature vs. volume graph. What does the area inside the box represent? Work? Like which parts on the P vs. V graph correspond to the parts on these graphs. I'm so confused. I would appreciate any help. Thanks.
     
  2. jcsd
  3. Apr 10, 2013 #2
    They are used to represent phase diagrams. The area under pressure temperature graph denotes phase existences and is mathematically not denoting anything.

    http://en.wikipedia.org/wiki/Phase_diagram
     
  4. Apr 10, 2013 #3
    If you want to calculate energy and work then P against V (it is usually this way) rather than P or V against T is the graph you need.
     
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