Multiple Choice
For the combustion reaction 2H₂(g) + O₂(g) → 2H₂O(g), what is the likely magnitude of the equilibrium constant K at a given temperature?
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16. Chemical Equilibrium
Equilibrium Constant K
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the equilibrium constant expression for the reaction 2 SO3(g) ⇌ 2 SO2(g) + O2(g)?
A
K = [SO3] / [SO2][O2]
B
K = [SO2]^2[O2] / [SO3]^2
C
K = [SO3]^2 / [SO2]^2[O2]
D
K = [SO2][O2] / [SO3]
Verified step by step guidance1
Identify the balanced chemical equation for the reaction: 2 SO3(g) ⇌ 2 SO2(g) + O2(g).
Understand that the equilibrium constant expression, K, is derived from the concentrations of the products and reactants at equilibrium.
For a general reaction aA + bB ⇌ cC + dD, the equilibrium constant expression is K = ([C]^c[D]^d) / ([A]^a[B]^b).
Apply this formula to the given reaction: K = ([SO2]^2[O2]^1) / ([SO3]^2).
Ensure that the exponents in the expression correspond to the stoichiometric coefficients from the balanced equation.
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