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What is meant by the term reversible reaction?
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7. Energy, Rate and Equilibrium
Chemical Equilibrium
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Which one of the following statements does not describe the equilibrium state?
A
While at equilibrium, a dynamic process is still occurring.
B
The concentration of the reactants is equal to the concentration of the products.
C
The concentration of the reactants and products reach a constant level.
D
At equilibrium, the net concentration of all species is not changing.
E
All are true.
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Understand the concept of chemical equilibrium: At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction, meaning the concentrations of reactants and products remain constant over time.
Analyze statement A: 'While at equilibrium, a dynamic process is still occurring.' This is true because reactions continue to occur in both directions, but at equal rates, maintaining constant concentrations.
Evaluate statement B: 'The concentration of the reactants is equal to the concentration of the products.' This is incorrect because equilibrium does not require equal concentrations, only that they remain constant.
Consider statement C: 'The concentration of the reactants and products reach a constant level.' This is true as equilibrium is characterized by constant concentrations.
Review statement D: 'At equilibrium, the net concentration of all species is not changing.' This is true because the dynamic balance of forward and reverse reactions keeps concentrations constant.
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