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Thermodynamic cycle

  1. Dec 1, 2008 #1
    1. The problem statement, all variables and given/known data
    Set up thermodynamic cycle for determining the enthalpy of hydration of Mg2+ ions
    The following enthalpies are given
    Sublimation of Mg
    ionization energies of Mg
    dissociation enthalpy of Cl2
    electron gain enthalpy of Cl
    enthalpy of solution of MgCl2(s)
    enhalpy of hydration of Cl-

    2. Relevant equations

    3. The attempt at a solution

    any hints how to set up the cycle?
  2. jcsd
  3. Dec 1, 2008 #2


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    Staff: Mentor

    Is any of the processes mentioned related to Mg2+ hydration?
  4. Dec 2, 2008 #3
    yeah, the solvation enthalpy, from solid to liquid, then the enthalpy of Cl- in the solution. The change of the enthalpy in the cycle should be 0, but how to find the difference in the MgCl2(s) and the gas phases?
  5. Dec 2, 2008 #4


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    Staff: Mentor

    Sorry, no idea what I was thinking :frown: Looks like there is something missing here.
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