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P-V diagram interpretation

  1. Feb 9, 2016 #1
    1. The problem statement, all variables and given/known data
    Two containers with saturated fluid at T0, while having different total volume V1 and V2
    definition of total molar volume: total liquid + vapor volume divided by the total moles
    屏幕快照 2016-02-09 上午7.23.03.png
    1. Compare the density of the vapor in both containers
    2. Compare the density of the liquid in both containers
    3. Compare the amount of the vapor in both containers

    2. Relevant equations

    3. The attempt at a solution
    I know that the overall density of container 2 is greater than that of container 1 as V2>V1, but I have no idea how to identify the vapor or liquid density just by comparing those two points, so for problem 1&2, I have completely no clue
    For problem 3, I assume that the amount of vapor is greater in container 2 as it is closer to the vapor region, but I'm not sure whether this explanation is reasonable
    Any help would be appreciated!
  2. jcsd
  3. Feb 11, 2016 #2


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    Science Advisor
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    Reread what you are to compare for questions 1 & 2.
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