Ch.15 - Chemical Kinetics

Tro - Chemistry: A Molecular Approach 5th Edition

Tro5th EditionChemistry: A Molecular ApproachISBN: 9780134874371당신이 사용하는 게 아니라요?교과서 변경

Tro 5th Edition

Ch.15 - Chemical Kinetics

문제 39b

15장, 문제 39b

A reaction in which A, B, and C react to form products is first order in A, second order in B, and zero order in C. b. What is the overall order of the reaction?

검증된 단계별 안내

Identify the order of the reaction with respect to each reactant: first order in A, second order in B, and zero order in C.

Recall that the overall order of a reaction is the sum of the orders with respect to each reactant.

Add the orders of the reactants: first order (A) + second order (B) + zero order (C).

Calculate the sum: 1 (from A) + 2 (from B) + 0 (from C).

The overall order of the reaction is the result of this sum.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

56s

도움이 되었나요?

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Reaction Order

The reaction order is a key concept in chemical kinetics that indicates the relationship between the concentration of reactants and the rate of the reaction. It is determined by the sum of the powers of the concentration terms in the rate law. For example, if a reaction is first order in A and second order in B, the overall order is the sum of these orders.

Rate Law

The rate law expresses the rate of a chemical reaction as a function of the concentration of its reactants, each raised to a power corresponding to its order in the reaction. The general form is Rate = k[A]^m[B]^n[C]^p, where k is the rate constant, and m, n, and p are the orders with respect to reactants A, B, and C, respectively. Understanding the rate law is essential for determining the overall order of the reaction.

Zero Order Reactions

In zero order reactions, the rate of reaction is independent of the concentration of the reactant. This means that changes in the concentration of a zero-order reactant do not affect the rate of the reaction. In the given question, since C is zero order, it does not contribute to the overall order, which is calculated solely from the other reactants.

관련 실천

교과서 질문

What are the units of k for each type of reaction?

a. first-order reaction

b. second-order reaction

c. zero-order reaction

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교과서 질문

A reaction in which A, B, and C react to form products is zero order in A, one-half order in B, and second order in C. c. By what factor does the reaction rate change if [A] is doubled (and the other reactant concentrations are held constant)? d. By what factor does the reaction rate change if [B] is doubled? e. By what factor does the reaction rate change if [C] is doubled? f. By what factor does the reaction rate change if [C] is doubled (and the other reactant concentrations are held constant)?

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교과서 질문

A reaction in which A, B, and C react to form products is first order in A, second order in B, and zero order in C c. By what factor does the reaction rate change if [A] is doubled (and the other reactant concentrations are held constant)? d. By what factor does the reaction rate change if [B] is doubled (and the other reactant concentrations are held constant)? e. By what factor does the reaction rate change if [C] is doubled? f. By what factor does the reaction rate change if the concentrations of all three reactants are doubled?

858

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교과서 질문

A reaction in which A, B, and C react to form products is zero order in A, one-half order in B, and second order in C. a. Write a rate law for the reaction.

833

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교과서 질문

This reaction is first order in N₂O₅: N₂O₅(g) → NO₃(g) + NO₂(g) The rate constant for the reaction at a certain temperature is 0.053/s. a. Calculate the rate of the reaction when [N₂O₅] = 0.055 M

531

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교과서 질문

This reaction is first order in N₂O₅: N₂O₅(g) → NO₃(g) + NO₂(g) The rate constant for the reaction at a certain temperature is 0.053/s. b. What would the rate of the reaction be at the concentration indicated in part a if the reaction were second order? Zero order? (Assume the same numerical value for the rate constant with the appropriate units.)

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