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Homework Help: Finding Kp given the final equilibrium pressure

  1. Dec 11, 2011 #1
    1. The problem statement, all variables and given/known data

    When two moles of CO are introduced into a vessel containing solid sulfur, the final equilibrium pressure is 1.03 atm. Determine Kp for the reaction:

    S(s) + 2CO(g) <--> SO2(g) + 2C(s)

    2. Relevant equations


    Mole Fraction = mole of A/ total moles

    3. The attempt at a solution

    I know Kp=P(products)/P(reactants)

    So I have Kp=[SO2]/[CO2]^2, I left the S and the C out because they are solids.

    I am not sure what to do with the final equilibrium pressure.
  2. jcsd
  3. Dec 13, 2011 #2


    User Avatar

    Staff: Mentor

    Is it all data given? If so, looks to me like there is not enough information to solve the problem.

    Usually final pressure can be used to find out how far reaction proceeded (using stoichiometry), but it can't be done in this case.
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