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March 24, 2017

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Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is S2 +C =CS2
Kc= 9.40 at 900k

How many grams of CS2(g) can be prepared by heating 14.3 moles of S2(g) with excess carbon in a 8.55 L reaction vessel held at 900 K until equilibrium is attained?

  • chemistry - ,

    ............S2(g) + C(s) ==> CS2(g)
    I..........1.67.....--.......0
    C...........-x.......--......x
    E.........1.67-x....--.......x

    Note: (S2) = 14.3mols/8.55L = 1.6725 M.

    Kc = 9.40 = (CS2)/(S2)
    Substitute the equilibrium line into Kc expression and solve for x = (CS2) in mols/L.
    x mols/L x 8.55 L = mols CS2
    g CS2 = mols x molar mass.

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    .022

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