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Enthalpy of isooctane at 500 K

  1. Sep 12, 2016 #1
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    I have to calculate the enthalpy of isooctane at 500 K.

    Isooctane is a liquid at room temperature and whenever enthalpy is to be calculated, it is from the standard state (278 K temperataure, 1 atm pressure).

    Do I calculate enthalpy upto boiling point, then use latent heat of vaporization and from that point calculate enthalpy upto 500 K using h = mCpΔT ? And if so, do I use the same value of Cp throughout?
     
  2. jcsd
  3. Sep 13, 2016 #2

    Bystander

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    What's the question say? Is it specific? Free form? Approximate?
     
  4. Sep 13, 2016 #3
    It says to calculate the enthalpy of isooctane at 500 K on a kJ/kmol basis
     
  5. Sep 13, 2016 #4

    Bystander

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    You haven't been given any constraints beyond units, so you are free to do as you wish.
     
  6. Sep 14, 2016 #5
    You haven't given the exact and complete problem statement.
     
  7. Sep 14, 2016 #6

    Dr Uma Sharma

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    Can you post the question again with more information ?
     
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