Physical Chemistry An endothermic reaction takes place when carbon reacts with w

Question

Physical Chemistry

An endothermic reaction takes place when carbon reacts with water vapor to form carbon monoxide gas and hydrogen gas shown below:

C(s) + 2 H2O(g) <----> CO(g) + H2(g)

If this reaction mixture is at equilibrium, predict whether each disturbance will result in the formation of additional water vapor, the formation of less water vapor, or have no effect on the quantity of water vapor. If answer is formation of additional water vapor, write additional. If it's less, write less. If it has no effect, write no effect.

(i) adding more C to the reaction mixture.

(ii) adding more H2O to the reaction.

(iii) raising the temperature of the reaction mixture.

(iv) increasing the volume of the reaction mixture

Explanation / Answer

(i) adding more C to the reaction mixture.
less
When one of the reactants is added, the equilibrium will shift to right.
(ii) adding more H2O to the reaction.
less
When one of the reactants is added, the equilibrium will shift to right.
(iii) raising the temperature of the reaction mixture.
less
When the temperature of an endothermic reaction is raised, the reaction will proceed in the forward drection.
(iv) increasing the volume of the reaction mixture
no effect
Since the number of moles of gaseous reactants are equal to the number of moles of gaseous products, the change in volume has no effect on equilibrium.

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