Ch.14 - Chemical Kinetics

Tro - Chemistry: A Molecular Approach 4th Edition

Tro4th EditionChemistry: A Molecular ApproachISBN: 9780134112831Non è quello che usi tu?Cambia libro di testo

Tro 4th Edition

Ch.14 - Chemical Kinetics

Problema 39c,d,e,f

Capitolo 14, Problema 39c,d,e,f

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?

Guida verificata passo dopo passo

Identify the rate law for the reaction. Since the reaction is first order in A, second order in B, and zero order in C, the rate law can be expressed as: \( \text{Rate} = k[A]^1[B]^2[C]^0 \).

Recognize that a zero order in C means that changes in the concentration of C do not affect the rate of the reaction.

Focus on the effect of doubling [A] while keeping [B] and [C] constant. Substitute the new concentration of A into the rate law: \( \text{New Rate} = k(2[A])^1[B]^2[C]^0 \).

Simplify the expression for the new rate: \( \text{New Rate} = 2k[A][B]^2 \).

Compare the new rate to the original rate: \( \text{New Rate} = 2 \times \text{Original Rate} \). Therefore, the reaction rate doubles when [A] is doubled.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.

Durata del video:

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Reaction Order

Reaction order refers to the power to which the concentration of a reactant is raised in the rate law of a chemical reaction. It indicates how the rate of reaction is affected by the concentration of that reactant. In this case, the reaction is first order in A, second order in B, and zero order in C, meaning that the rate depends linearly on [A], quadratically on [B], and is independent of [C].

Video consigliato:

Percorso guidato

00:36

Average Bond Order

Rate Law

The rate law expresses the relationship between the rate of a chemical reaction and the concentration of its reactants. It is typically written in the form Rate = k[A]^m[B]^n[C]^p, where k is the rate constant, and m, n, and p are the orders of the reaction with respect to each reactant. For the given reaction, the rate law can be expressed as Rate = k[A]^1[B]^2[C]^0, highlighting how changes in concentrations affect the overall reaction rate.

Video consigliato:

Percorso guidato

01:52

Rate Law Fundamentals

Effect of Concentration Change on Reaction Rate

When the concentration of a reactant is changed, the reaction rate changes according to its order. For a first-order reactant, doubling the concentration will double the rate, while for a second-order reactant, it will quadruple the rate. In this scenario, since [A] is doubled and it is first order, the reaction rate will also double, while the concentrations of B and C remain constant.

Video consigliato:

Percorso guidato

02:10

Concentration Changes and Rate Law Example

Pratica correlata

Domanda del libro di testo

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)?

2570

views

Domanda del libro di testo

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

views

Domanda del libro di testo

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?

422

views

Domanda del libro di testo

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.

a. Write a rate law for the reaction.

Domanda del libro di testo

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.)

2748

views

rank