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Ch.14 - Chemical Kinetics
Tro - Chemistry: A Molecular Approach 4th Edition
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Tutti i libri di testoTro 4th EditionCh.14 - Chemical KineticsProblema 31a
Capitolo 14, Problema 31a

Consider the reaction: C4H8( g) → 2 C2H4( g) The tabulated data were collected for the concentration of C2H4 as a function of time: a. What is the average rate of the reaction between 0 and 10 s? Between 40 and 50 s?

Guida verificata passo dopo passo
1
Determine the change in concentration of C_2H_4 between the given time intervals.
For the interval 0 to 10 s, calculate \( \Delta [C_2H_4] = [C_2H_4]_{10s} - [C_2H_4]_{0s} \).
For the interval 40 to 50 s, calculate \( \Delta [C_2H_4] = [C_2H_4]_{50s} - [C_2H_4]_{40s} \).
Calculate the time interval \( \Delta t \) for each case: \( \Delta t = t_{final} - t_{initial} \).
Use the formula for average rate of reaction: \( \text{Average Rate} = \frac{\Delta [C_2H_4]}{\Delta t} \) for each time interval.

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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 over a specific time interval. Understanding how to calculate the average rate involves determining the difference in concentration at two time points and dividing by the time elapsed.
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Average Rate of Reaction

Concentration

Concentration refers to the amount of a substance (solute) present in a given volume of solution or mixture. In the context of gas reactions, concentration can be expressed in terms of moles per liter (Molarity) or partial pressure. Monitoring changes in concentration over time is crucial for calculating reaction rates and understanding the dynamics of the reaction.
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Stoichiometry

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between the reactants and products in a chemical reaction. It allows chemists to predict the amounts of substances consumed and produced based on the balanced chemical equation. In this reaction, the stoichiometry indicates that 4 moles of C4H8 produce 2 moles of C2H4, which is essential for understanding the relationship between the concentrations of the reactants and products.
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