
Write equilibrium constant expressions for the following reactions. For gases, use either pressures or concentrations.
- (a) 2 H2O2(g) ⇄ 2 H2O(g) + O2(g)
- (b) CO(g) + ½ O2g ⇄ CO2(g)
- (c) C(s) + CO2(g) ⇄ 2 CO(g)
- (d) NiO(s) + CO(g) ⇄ Ni(s) + CO2(g)
(a)

Interpretation: The equilibrium constant for the given reaction has to be identified.
Concept Introduction: At equilibrium the concentration of the reaction and the product is equated to a constant
If a reaction is as
The equilibrium constant
Answer to Problem 1PS
The equilibrium constant for the reaction is given below,
Explanation of Solution
The equilibrium constant for the reaction can be calculated as,
The product concentrations appear in the numerator and reactant concentrations appear in the denominator. Each concentration should be raised to a power equal to the stoichiometric coefficient in the balanced equation.
The equilibrium constant for the above reaction is given below,
(b)

Interpretation: The equilibrium constant for the given reaction has to be identified.
Concept Introduction: At equilibrium the concentration of the reaction and the product is equated to a constant
If a reaction is as
The equilibrium constant
Answer to Problem 1PS
The equilibrium constant for the reaction is given below,
Explanation of Solution
The equilibrium constant for the reaction can be calculated as,
The product concentrations appear in the numerator and reactant concentrations appear in the denominator. Each concentration should be raised to a power equal to the stoichiometric coefficient in the balanced equation.
The equilibrium constant for the above reaction is given below,
(c)

Interpretation: The equilibrium constant for the given reaction has to be identified.
Concept Introduction: At equilibrium the concentration of the reaction and the product is equated to a constant
If a reaction is as
The equilibrium constant
Answer to Problem 1PS
The equilibrium constant for the reaction is given below,
Explanation of Solution
The equilibrium constant for the reaction can be calculated as,
The product concentrations appear in the numerator and reactant concentrations appear in the denominator. Each concentration should be raised to a power equal to the stoichiometric coefficient in the balanced equation.
The equilibrium constant for the above reaction is given below,
(d)

Interpretation: The equilibrium constant for the given reaction has to be identified.
Concept Introduction: At equilibrium the concentration of the reaction and the product is equated to a constant
If a reaction is as
The equilibrium constant
Answer to Problem 1PS
The equilibrium constant for the reaction is given below,
Explanation of Solution
The equilibrium constant for the reaction can be calculated as,
The product concentrations appear in the numerator and reactant concentrations appear in the denominator. Each concentration should be raised to a power equal to the stoichiometric coefficient in the balanced equation.
The equilibrium constant for the above reaction is given below,
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