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Ideal gas equation and heat problem

  1. May 20, 2006 #1
    An ideal gas is taken from state 1 to state 2. How does the volume change? The P-T diagram is as shown.
    I solved it in the following way:
    From the diagram it is clear that P/T is a constant. From ideal gas equation,
    PV = nRT
    V = (nR)/(P/T)
    = constant
    But the answer given in my book is that volume increases. I think the book answer is wrong. What do you say Sir?

    Attached Files:

  2. jcsd
  3. May 20, 2006 #2

    Andrew Mason

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    Homework Helper

    If the graph of P vs. T is a straight line, Volume must be constant. Is the P-T graph a straight line?

  4. May 20, 2006 #3
    Yes Sir. It is a straight line.
  5. May 21, 2006 #4
    That would be definetely constant. Because on V=(nR)(P/T), the only value we need to consider here is P and T because it will be assume that they have the same number of n and R is constant also.
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