The best description of the effect of a catalyst on a chemical reaction is that it
A - VCE - SSCE Chemistry - Question 5 - 2002 - Paper 1
Question 5
The best description of the effect of a catalyst on a chemical reaction is that it
A. lowers the activation energy of the forward reaction without changing the activ... show full transcript
Worked Solution & Example Answer:The best description of the effect of a catalyst on a chemical reaction is that it
A - VCE - SSCE Chemistry - Question 5 - 2002 - Paper 1
Step 1
A. lowers the activation energy of the forward reaction without changing the activation energy of the reverse reaction.
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Answer
This statement is incorrect. A catalyst affects both the forward and reverse reactions.
Step 2
B. lowers the activation energy of the forward reaction and raises the activation energy of the reverse reaction.
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Answer
This statement is incorrect. A catalyst lowers the activation energy of both it does not raise one.
Step 3
C. lowers the activation energy of both forward and reverse reactions by the same amount.
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Answer
This is the correct answer. A catalyst lowers the activation energy of both reactions equally, facilitating the reaction in both directions.
Step 4
D. lowers the activation energy of the reverse reaction without changing the activation energy of the forward reaction.
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Answer
This statement is incorrect. A catalyst alters the activation energy for both the forward and reverse reactions.
