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Chapter 16: Problem 78

What does it mean to say that chemical equilibrium is a dynamic process?

Short Answer

Expert verified
Chemical equilibrium being a dynamic process means that the forward and reverse reactions in a chemical system are continuously occurring at equal rates, maintaining constant concentrations of reactants and products over time. Despite no net change in concentrations, both reactions are constantly happening and can adjust to changes in factors like temperature, pressure, or concentration by shifting the equilibrium position, as described by Le Chatelier's principle.

Step by step solution

01

Definition of Chemical Equilibrium

Chemical equilibrium is a state in which the concentrations of reactants and products in a chemical reaction remain constant over time. In this state, the rate at which the reactants are converted into products is equal to the rate at which the products are converted back into reactants.
02

Dynamic Process

A dynamic process means that the reaction is continuously happening, even though there may be no net change in the concentrations of reactants and products. In other words, the forward and reverse reactions are constantly occurring at equal rates, maintaining a constant ratio of reactant and product concentrations.
03

Relation between Forward and Reverse Reaction Rates

In a chemical equilibrium, the forward reaction rate (converting reactants to products) is equal to the reverse reaction rate (converting products back to reactants). This balance in reaction rates is what keeps the concentrations of reactants and products constant over time, even though both reactions are constantly happening.
04

Factors Affecting the Equilibrium

Although the concentrations of reactants and products remain constant in a system at equilibrium, changes in factors like temperature, pressure, or concentration can cause the equilibrium to shift. The system will adjust to these changes by altering the rates of the forward and reverse reactions, until a new state of equilibrium is reached. This is described by the Le Chatelier's principle.
05

Conclusion

To say that chemical equilibrium is a dynamic process means that the forward and reverse reactions are continuously happening at equal rates, keeping the concentrations of reactants and products constant over time. This process is dynamic because both reactions are always occurring, and the system can adjust to changes in conditions by shifting the equilibrium position.

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Most popular questions from this chapter

The minimum energy required for molecules to react with each other is called the ____ energy.

How do chemists envision reactions taking place in terms of the collision model for reactions? Give an example of a simple reaction and how you might envision the reaction's taking place by means of a collision between the molecules.

There is only one value of the equilibrium constant for a particular system at a particular temperature, but there is an infinite number of equilibrium positions. Explain.

At high temperatures, elemental nitrogen and oxygen react with each other to form nitrogen monoxide. $$\mathrm{N}_{2}(g)+\mathrm{O}_{2}(g) \rightleftharpoons 2 \mathrm{NO}(g)$$ Suppose the system is analyzed at a particular temperature, and the equilibrium concentrations are found to be \(\left[\mathrm{N}_{2}\right]=0.041 \mathrm{M},\left[\mathrm{O}_{2}\right]=0.0078 \mathrm{M},\) and \([\mathrm{NO}]=4.7 \times 10^{-4} \mathrm{M} .\) Calculate the value of \(K\) for the reaction.

What is a catalyst? How does a catalyst speed up a reaction?
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