At constant temperature, which one of the following always corresponds to an increase of the yield of a chemical reaction?
A - VCE - SSCE Chemistry - Question 10 - 2023 - Paper 1
Question 10
At constant temperature, which one of the following always corresponds to an increase of the yield of a chemical reaction?
A. An increase in the value of the equili... show full transcript
Worked Solution & Example Answer:At constant temperature, which one of the following always corresponds to an increase of the yield of a chemical reaction?
A - VCE - SSCE Chemistry - Question 10 - 2023 - Paper 1
Step 1
A. An increase in the value of the equilibrium expression.
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Answer
An increase in the value of the equilibrium expression does not directly relate to the yield of a reaction; it is simply a reflection of the reaction's state at equilibrium.
Step 2
B. An increase in the concentration of the reactants.
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Answer
Increasing the concentration of reactants shifts the equilibrium position towards the products according to Le Chatelier's principle, which can lead to an increase in yield.
Step 3
C. A decrease in the activation energy.
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A decrease in activation energy can increase the rate of the reaction but does not guarantee an increase in yield, especially if the reaction shifts unfavorably.
Step 4
D. An increase in the pressure.
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Increasing pressure can increase the yield of gaseous reactions that produce fewer moles of gas. However, it won't always affect liquid or solid reactions.
