1. (a) State the two quantities that must be measured to establish the rate of a chemical reaction and cite several factors that affect the rate of a chemical formation of N_(2) are (b) Explain why the rate of disappearance of NO not the same in the reaction. 2CO(g)+2NO_((g))arrow 2CO_(2(g))+N_(2(g)) and the rate of marks) (2 marks) (c) In a reaction mechanism: (i) what is the difference between an activated complex and an intermediate (ii) rate determining step and rate of reaction (4 marks)

Question

Question

1. (a) State the two quantities that must be measured to establish the rate of a chemical reaction and cite several factors that affect the rate of a chemical formation of N_(2) are (b) Explain why the rate of disappearance of NO not the same in the reaction. 2CO(g)+2NO_((g))arrow 2CO_(2(g))+N_(2(g)) and the rate of marks) (2 marks) (c) In a reaction mechanism: (i) what is the difference between an activated complex and an intermediate (ii) rate determining step and rate of reaction (4 marks)

Answer 1

(a) Concentration of reactants/products and time; factors include temperature, concentration, surface area, catalysts, and nature of reactants. (b) The rate of disappearance of $NO$ is twice the rate of formation of $N_{2}$ due to the stoichiometric ratio. (c) (i) Activated complex is a high-energy, temporary arrangement of atoms; an intermediate is a more stable species formed during the reaction. (ii) The rate-determining step is the slowest step that controls the overall reaction rate.

Answer 2

(a) To establish the rate of a chemical reaction, the two quantities that must be measured are the concentration of reactants/products and the time. Factors affecting the rate of a chemical reaction include temperature, concentration of reactants, surface area, catalysts, and the nature of the reactants. (b) The rate of disappearance of $NO$ is not the same as the rate of formation of $N_{2}$ in the reaction $2CO(g) + 2NO(g) \rightarrow 2CO_{2(g)} + N_{2(g)}$ because the stoichiometric coefficients of $NO$ and $N_{2}$ are different. The rate of disappearance of $NO$ is twice the rate of formation of $N_{2}$ due to the stoichiometric ratio of 2:1. (c) (i) An activated complex (or transition state) is a temporary, high-energy arrangement of atoms that forms during the course of a reaction and exists at the peak of the reaction energy profile. An intermediate, on the other hand, is a species that is formed during the reaction but is not present in the final products; it is more stable than the activated complex but less stable than the reactants or products. (ii) The rate-determining step is the slowest step in a reaction mechanism that determines the overall rate of the reaction. The rate of reaction is the speed at which reactants are converted into products, and it is governed by the rate-determining step.

Question

Answer

Answer

Explain

Hot Questions