Consider the reaction CO(g) + H₂O(g) CO₂(g) + H₂(g), represented by the following diagram: What is the composition of this system when the reaction reaches equilibrium?

Question

Quizplus · Accepted Answer

At equilibrium, the reaction will proceed in such a way that the concentrations of products and reactants will become constant. In this case, the law of mass action can be used to determine the equilibrium concentrations. The balanced equation for the reaction is: CO(g) + H₂O(g) ⇌ CO₂(g) + H₂(g) The equilibrium constant expression is: Kc = [CO₂][H₂] / [CO][H₂O] The initial concentrations are: [CO] = 3 mol [H₂O] = 3 mol [CO₂] = 0 mol [H₂] = 0 mol Substituting these values into the expression for Kc gives: Kc = (0 mol)(0 mol) / (3 mol)(3 mol) = 0 This implies that the concentration of products is zero at equilibrium. Therefore, all the reactants must be conserved. The composition of the system at equilibrium is: [CO] = 2 mol [H₂O] = 2 mol [CO₂] = 8 mol [H₂] = 8 mol Hence, the correct answer is C.

Consider the Reaction CO(g) + H2O(g) CO2(g) + H2(g), Represented

Consider the Reaction CO(g) + H₂O(g) CO₂(g) + H₂(g), Represented