A reaction was carried out as shown in the energy diagram - Scottish Highers Chemistry - Question 4 - 2023
Question 4
A reaction was carried out as shown in the energy diagram.
Which of the following has a value of 150 kJ mol⁻¹?
A. Activation energy of the reverse reaction
B. Enth... show full transcript
Worked Solution & Example Answer:A reaction was carried out as shown in the energy diagram - Scottish Highers Chemistry - Question 4 - 2023
Step 1
A. Activation energy of the reverse reaction
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Answer
The activation energy for the reverse reaction is calculated by determining the difference between the potential energy of the products and the peak energy of the transition state. Since the diagram indicates a value of 150 kJ mol⁻¹, this option is applicable.
Step 2
B. Enthalpy change of the reverse reaction
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Answer
The enthalpy change of the reverse reaction is represented by the difference in energy between the products and reactants. This does not directly correlate to 150 kJ mol⁻¹ as it is not simply the activation energy.
Step 3
C. Activation energy of the forward reaction
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Answer
The activation energy of the forward reaction corresponds to the difference between the potential energy of the reactants and the peak of the energy diagram. This value is not given as being 150 kJ mol⁻¹.
Step 4
D. Enthalpy change of the forward reaction
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Answer
The enthalpy change for the forward reaction is derived from the difference in energy between the reactants and products but is not specified as 150 kJ mol⁻¹ in this context.
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