Problem 15.73
A mixture of H2, S, and H2S is held in a 1.0-Lvessel at 90 ∘C
and reacts according to the equation:
H2(g)+S(s)⇌H2S(g)
At equilibrium the mixture contains 0.46 g of H2Sand 0.40 gH2.
Part A
Write the equilibrium-constant expression for this reaction.
Part B
What is the value of Kc for the reaction at this temperature?
the equilibrium constant can be written as:
but as s is solid, [S]=1, then:
and the value of k_c can be calculated as:
first the concentration values as mol/L
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