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Chemical Equilibrium Concepts

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Questions and Answers

What is the key to understanding equilibrium?

The second law of thermodynamics only

The concept of chemical equilibrium

Entropy and the second law of thermodynamics (correct)

The first law of thermodynamics

What happens to the entropy of an isolated system as it approaches equilibrium?

It fluctuates randomly

It increases to a maximum (correct)

It remains constant

It decreases to a minimum

What characterizes a state of chemical equilibrium?

A complete conversion of reactants to products

A balance between two opposing forces or processes (correct)

A constant increase in reactant concentration

A permanent cessation of reaction

What happens to the rates of forward and reverse reactions in a reversible reaction as it approaches equilibrium?

The forward reaction rate decreases, while the reverse reaction rate increases Signup and view all the answers

What is the result of keeping the components of a reversible reaction together in a sealed container?

The reaction reaches a state of equilibrium Signup and view all the answers

What is the state of the reaction when the forward and reverse reactions are occurring at the same rate?

Dynamic equilibrium Signup and view all the answers

What is true about the concentrations of reactants and products at equilibrium?

Their rates are equal, but their concentrations are not equal Signup and view all the answers

What happens to the forward reaction rate as the concentration of HI increases?

It decreases Signup and view all the answers

What is the initial reaction that occurs when equal molar concentrations of gaseous H2 and I2 are mixed and allowed to react in a closed vessel?

Forward reaction between H2 and I2 Signup and view all the answers

What is the condition required for the reaction to reach a state of chemical equilibrium?

The reactants are consumed at the same rate they are replenished Signup and view all the answers