7. Energy, Rate and Equilibrium

Energy Diagrams

7. Energy, Rate and Equilibrium

Energy Diagrams

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Energy Diagrams Concept 1

Energy Diagrams Example 1

Energy Diagrams Concept 2

Energy Diagrams Example 2

Energy Diagrams Concept 3

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Multiple Choice

Which of the following statements is true regarding the energy diagram provided?

i. The reaction is endothermic.
ii. The activation energy is +10 kJ.
iii. The reaction releases energy.
iv. The enthalpy of the reaction is –25 kJ.

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Multiple Choice

Which of the following reactions proceeds the slowest?

Reaction 1 Reaction 2 Reaction 3

Which reaction is faster, one with E_act = +10 kcal/mol(+41.8 kJ/mol) or one with E_act = +5 kcal/mol(+20.9 kJ/mol)? Explain.

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Textbook Question

a. Why do chemical reactions require energy of activation?

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Textbook Question

c. Draw an energy diagram for an exothermic reaction.

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Textbook Question

Sketch an energy diagram for a system in which the forward reaction has E_act = +25 kcal/mol (+105 kJ/mol) and the reverse reaction has E_act = +35 kcal/mol (+146 kJ/mol). Is the forward process endergonic or exergonic?

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