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Homework Help: Kp for heterogeneous Equilibria (with (l))

  1. Sep 13, 2015 #1
    1. The problem statement, all variables and given/known data
    3Cu(s) + 2NO3-(aq) + 8H+(aq) ⇔3Cu2+(aq) + 2NO(g) + 4H2O(l)
    Kp and Kc relationship? does Kp exist?
    or HCl(g)⇔H+(aq)+Cl-(aq)
    2. Relevant equations
    Law of mass action, Kp=Kc(RT)Δng

    3. The attempt at a solution
    In lots of places contradictory results are there, some say that in Kp , (not clearly signifying presence of liquid state) that just take gaseous moles, and in some, Kp doesnt exist..we know that solvent and solid state can be ignored in all K .. Does Kp exist for a reaction including a reactant/product in aqueous or liquid form? (im not asking about thermodynamical constant which is quite crystal clear in definition by acivity)
  2. jcsd
  3. Sep 13, 2015 #2


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    Can you write activities of reactants and products as functions of P (fugacity)?
  4. Sep 13, 2015 #3
    if we assume ideal behaviour and remove concept of activity (by taking the measurement of species in bar and M) ..
    a simple answer in yes or no would suffice... and 2nd part of question was whether Kc of Hcl reaction exists too
    [sorry for my lack of knowledge in chemistry in general, thats why im going back to strengthen my roots]
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