A) The reaction is exothermic. 2 -50 B) The activation energy is 50 kJ/mol. -37.5 1 C) AH = -25.0 KJ/mol. +25 D) Point 2 is an activated complex. -12.5 E) The products are lower in energy than the 3 reactants. Reaction Profile Energy (kJ/mol)
A) The reaction is exothermic. 2 -50 B) The activation energy is 50 kJ/mol. -37.5 1 C) AH = -25.0 KJ/mol. +25 D) Point 2 is an activated complex. -12.5 E) The products are lower in energy than the 3 reactants. Reaction Profile Energy (kJ/mol)
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Which statement is incorrect for the following reaction profile?
A) The reaction is exothermic.
B) The activation energy is 50 kJ/mol.
C) ∆H = –25.0 kJ/mol.
D) Point 2 is an activated complex.
E) The products are lower in energy than the reactants.
Transcribed Image Text:**Question:**
Which statement is incorrect for the following reaction profile?
**Graph Description:**
The graph illustrates a reaction profile with energy (kJ/mol) on the y-axis and the progress of the reaction on the x-axis.
- **Point 1:** Initial energy level of the reactants at 37.5 kJ/mol.
- **Point 2:** Maximum energy peak at 50 kJ/mol, indicating the activated complex.
- **Point 3:** Final energy level of the products at 12.5 kJ/mol.
**Statements:**
A) The reaction is exothermic.
B) The activation energy is 50 kJ/mol.
C) ΔH = -25.0 kJ/mol.
D) Point 2 is an activated complex.
E) The products are lower in energy than the reactants.
**Explanation:**
- The correct statement should indicate that the energy change, ΔH, is calculated from the difference between the products and reactants.
- The peak represents the highest energy point in the reaction, which is the transition state or activated complex.
- The reaction is exothermic since the products have a lower energy level than the reactants.
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