Multiple Choice
If the transition state has a high energy relative to the energies of the reactants and products, what does this say about the reaction?
6. Thermodynamics and Kinetics
Energy Diagram
Back6. Thermodynamics and Kinetics
Energy Diagram
- Multiple ChoiceWhich equation would you use to calculate the rate of a reaction?
- Multiple ChoiceComplete the following sentence: Breaking bonds ____________.
- Multiple ChoiceWhich reaction coordinate diagram matches the following acid/base reaction?
- Multiple ChoiceIn an enantioselective reaction, what best accounts for the formation of one enantiomer preferentially over the other enantiomer?
- Textbook Question
The bond angles in a regular polygon with n sides are equal to 180° - 360°/n
a. What are the bond angles in a regular octagon?
b. What are the bond angles in a regular nonagon?
- Textbook QuestionThe bromination of methane proceeds through the following steps:1. Br2 + 2 Br• ΔH° (per mole)/+190 kJ (45 kcal)Ea (per mole)/ 190 kJ (45 kcal)2. CH4 + Br• —> CH3+ HBr +73 kJ (17 kcal) 79 kJ (19 kcal) 3. • CH3 + Br2 —> CH3Br + Br -112 kJ (-27 kcal) 4 kJ (1 kcal) a. Draw a complete reaction-energy diagram for this reaction. b. Label the rate-limiting step.
- Textbook Question
Draw a reaction-energy diagram for a one-step exothermic reaction. Label the parts that represent the reactants, products, transition state, activation energy, and heat of reaction.
- Textbook Question
The bromination of methane proceeds through the following steps:
a. Draw a complete reaction-energy diagram for this reaction.
b. Label the rate-limiting step.
- Textbook Question
Draw the reaction-energy diagram for the following reverse reaction:
•CH3 + HCl → CH4 + Cl•
- Textbook Question
Draw a reaction-energy diagram for the following reaction:
•CH3 + Cl2 → CH3Cl + Cl•
The activation energy is 4 kJ/mol (1 kcal/mol), and the overall ΔH° for the reaction is –110 kJ/mol (–27 kcal/mol).
- Textbook Question
•CH3 + Cl2 → CH3Cl + Cl•
The activation energy is 4 kJ/mol (1 kcal/mol), and the overall ΔH° for the reaction is –110 kJ/mol (–27 kcal/mol).
b. Give the equation for the reverse reaction.
c. What is the activation energy for the reverse reaction?
- Textbook Question
Draw a reaction-energy diagram for a two-step endothermic reaction with a rate-limiting second step.
- Textbook Question
a. Draw an approximate reaction-energy diagram for the acid–base reaction of phenol (see below) with 1-molar aqueous sodium hydroxide solution.
b. On the same diagram, draw an approximate reaction-energy diagram for the acid–base reaction of tert-butyl alcohol (see below) with 1-molar aqueous sodium hydroxide solution.
- Textbook Question
Given the reaction coordinate diagram for the reaction of A to form G, answer the following questions:
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a. How many intermediates are formed in the reaction?
b. Which letters represent transition states?
c. What is the fastest step in the reaction?
d. Which is more stable: A or G?
e. Does A or E form faster from C?
f. Which is the more stable intermediate?