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Problem 15.73 A mixture of H2, S, and H2S is held in a 1.0-Lvessel at 90...

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?

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Homework Answers

Answer #1

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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