Final answer:
The reaction rate of the given chemical reaction can be calculated based on the stoichiometry of the reaction. Using the stoichiometric coefficients, we can determine the rate of change of concentration for each species. The rate of the reaction in this case is -0.065 M/s.
Step-by-step explanation:
The reaction rate of a chemical reaction can be determined by calculating the rate of change of concentration of each species involved in the reaction. In the given reaction, 8H₂S(g) + 4O₂(g) → 8H₂O(g) + S₈(g), the reaction rate can be expressed as: Δ[H₂S]/Δt = -0.065 M/s, where M stands for molarity. This means that the concentration of H₂S is decreasing at a rate of 0.065 M per second.
To calculate Δ[O₂]/Δt, we can use the stoichiometric coefficients of the balanced equation. Since the coefficient of O₂ is 4, the rate of change of its concentration will be four times the rate of change of H₂S concentration. Therefore, Δ[O₂]/Δt = 4 x (-0.065 M/s) = -0.26 M/s.Similarly, to calculate Δ[H₂O]/Δt, we can use the stoichiometric coefficients. Since the coefficient of H₂O is 8, the rate of change of its concentration will be eight times the rate of change of H₂S concentration. Therefore, Δ[H₂O]/Δt = 8 x (-0.065 M/s) = -0.52 M/s.
Lastly, to calculate Δ[S₈]/Δt, we can use the stoichiometric coefficients. Since the coefficient of S₈ is 1, the rate of change of its concentration will be the same as the rate of change of H₂S concentration. Therefore, Δ[S₈]/Δt = -0.065 M/s.To find the rate of the reaction, we can use the rate expression based on the stoichiometry of the reaction. In this case, the rate of the reaction is equal to the rate of change of concentration of any of the reactants or products. Therefore, the rate of the reaction is -0.065 M/s.