Skip to main content
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
Tutti i libri di testoTro 4th EditionCh.14 - Chemical KineticsProblema 25b
Capitolo 14, Problema 25b

Consider the reaction:
2 HBr (g) → H2 (g) + Br2 (g)
b. In the first 25.0 s of this reaction, the concentration of HBr dropped from 0.600 M to 0.512 M. Calculate the average rate of the reaction during this time interval.

Guida verificata passo dopo passo
1
Determine the change in concentration of HBr: \( \Delta [\text{HBr}] = [\text{HBr}]_{\text{final}} - [\text{HBr}]_{\text{initial}} \).
Substitute the given concentrations into the equation: \( \Delta [\text{HBr}] = 0.512 \text{ M} - 0.600 \text{ M} \).
Calculate the change in time: \( \Delta t = 25.0 \text{ s} \).
Use the formula for average rate of reaction: \( \text{Average rate} = -\frac{\Delta [\text{HBr}]}{\Delta t} \).
Substitute the values of \( \Delta [\text{HBr}] \) and \( \Delta t \) into the rate equation to find the average rate.

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:
1m

Concetti chiave

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

Reaction Rate

The reaction rate is a measure of how quickly reactants are converted into products in a chemical reaction. It is typically expressed as the change in concentration of a reactant or product per unit time. In this case, the average rate can be calculated by determining the change in concentration of HBr over the specified time interval.
Video consigliato:
Percorso guidato
02:03
Average Rate of Reaction

Concentration Change

Concentration change refers to the difference in the amount of a substance in a given volume before and after a reaction occurs. For the reaction provided, the concentration of HBr decreases from 0.600 M to 0.512 M, indicating that HBr is being consumed as the reaction progresses. This change is essential for calculating the average rate of the reaction.
Video consigliato:
Percorso guidato
01:53
Chemical Changes

Average Rate Calculation

The average rate of a reaction can be calculated using the formula: average rate = -Δ[HBr]/Δt, where Δ[HBr] is the change in concentration of HBr and Δt is the change in time. In this scenario, the negative sign indicates that the concentration of HBr is decreasing. By substituting the values into this formula, one can determine the average rate of the reaction over the specified time interval.
Video consigliato:
Percorso guidato
02:42
Average Rate Calculation Example
Pratica correlata
Domanda del libro di testo

Consider the reaction:

2 HBr (g) → H2 (g) + Br2 (g)

c. If the volume of the reaction vessel in part b was 1.50 L, what amount of Br2 (in moles) was formed during the first 15.0 s of the reaction?

2587
views
1
comments
Domanda del libro di testo

Consider the reaction: 2 N2O( g) → 2 N2(g) + O2(g) a. Express the rate of the reaction in terms of the change in concentration of each of the reactants and products.

3067
views
Domanda del libro di testo

Consider the reaction:

2 HBr (g) → H2 (g) + Br2 (g)

a. Express the rate of the reaction in terms of the change in concentration of each of the reactants and products.

1716
views
1
rank