The Reaction Quotient Video Lessons

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Problem: A mixture of 0.2 moles of H2S(g), 0.5 moles of S8(s), and 0.35 moles of H2(g) is placed in a 2L container where the equilibrium 8H2S(g) ⇌ 8H2(g) + S8(s) is established. If the equilibrium constant for this reaction is Kc = 162, which of the following statements is true? a) Q = 162 and the reaction is already at equilibrium. b) Q = 44 and the reaction proceeds to the left c) Q = 88 and the reaction proceeds to the right d) Q = 44 and the reaction proceeds to the right e) Q = 88 and the reaction proceeds to the left

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Problem Details

A mixture of 0.2 moles of H2S(g), 0.5 moles of S8(s), and 0.35 moles of H2(g) is placed in a 2L container where the equilibrium

8H2S(g) ⇌ 8H2(g) + S8(s)

is established. If the equilibrium constant for this reaction is Kc = 162, which of the following statements is true?

a) Q = 162 and the reaction is already at equilibrium.

b) Q = 44 and the reaction proceeds to the left

c) Q = 88 and the reaction proceeds to the right

d) Q = 44 and the reaction proceeds to the right

e) Q = 88 and the reaction proceeds to the left

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Based on our data, we think this problem is relevant for Professor Pomeroy's class at UCSD.