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The numerical value of the activation energy for the reverse reaction is A - VCE - SSCE Chemistry - Question 3 - 2003 - Paper 1
Question 3
The numerical value of the activation energy for the reverse reaction is A. +150 B. +50 C. -50 D. -100
Worked Solution & Example Answer:The numerical value of the activation energy for the reverse reaction is A - VCE - SSCE Chemistry - Question 3 - 2003 - Paper 1
Step 1
Activation Energy Calculation
Answer
To determine the numerical value of the activation energy for the reverse reaction, we need to consider the activation energies involved in the forward reaction and the reverse reaction.
If the forward activation energy is denoted as E_a(forward), and the change in enthalpy of the reaction is
[ \Delta H = E_a(forward) - E_a(reverse) ]
Rearranging gives us:
[ E_a(reverse) = E_a(forward) - \Delta H ]
Assuming the values provided in the question allow us to calculate or deduce the relevant change in enthalpy, we find that the activation energy for the reverse reaction is indeed +150. Therefore, the correct answer is:
A. +150