For the reaction: 2A(g) + B(g) ⇌ 3C(g), what is the correct expression for the equilibrium constant Kc? (2021)
Practice Questions
1 question
Q1
For the reaction: 2A(g) + B(g) ⇌ 3C(g), what is the correct expression for the equilibrium constant Kc? (2021)
[C]^3 / ([A]^2[B])
[A]^2[B] / [C]^3
[C]^3 / [A]^2
[B] / [C]^3
The equilibrium constant Kc is given by the expression Kc = [C]^3 / ([A]^2[B]), where the concentrations are raised to the power of their coefficients.
Questions & Step-by-step Solutions
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Q
Q: For the reaction: 2A(g) + B(g) ⇌ 3C(g), what is the correct expression for the equilibrium constant Kc? (2021)
Solution: The equilibrium constant Kc is given by the expression Kc = [C]^3 / ([A]^2[B]), where the concentrations are raised to the power of their coefficients.
Steps: 5
Step 1: Identify the balanced chemical equation: 2A(g) + B(g) ⇌ 3C(g).
Step 2: Write the expression for the equilibrium constant Kc, which is based on the concentrations of the products and reactants.
Step 3: For each product, take its concentration and raise it to the power of its coefficient in the balanced equation. Here, C has a coefficient of 3, so we write [C]^3.
Step 4: For each reactant, take its concentration and raise it to the power of its coefficient. A has a coefficient of 2, so we write [A]^2, and B has a coefficient of 1, so we write [B]^1 (which can be omitted).
Step 5: Combine these parts into the Kc expression: Kc = [C]^3 / ([A]^2[B]).
