AnswersCR03101 ChemistryLab: Reaction Rate

Reaction Pathways Answers

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Consider the reaction pathway graph below.Which inference is supported by evidence in the graph?

Question illustration
A
A and C show that the reaction enthalpy is less than the activation energy.
B
G and E show that this reaction is an endothermic process with heat release.
C
B and F show that the activated complex has less energy than the reactants.
D
E and D show that the energy of the products is less than that of the reactants.
3

Consider the reaction pathway graph below.Which statement accurately describes this graph?

Question illustration
A
It represents an endothermic reaction because the product has more energy than the reactants.
B
It represents an exothermic reaction because the product has more energy than the reactants.
C
It represents an endothermic reaction because the reactants have more energy than the product.
D
It represents an exothermic reaction because the reactants have more energy than the product.
4

Which statement best describes how to read a reaction pathway graph for an endothermic reaction?

A
Reactants absorb a minimum amount of energy and then release a larger amount of energy as products form.
B
Reactants release a minimum amount of energy and then absorb a larger amount of energy as products form.
C
Reactants absorb a minimum amount of energy and then release a smaller amount of energy as products form.
D
Reactants release a minimum amount of energy and then absorb a smaller amount of energy as products form.
5

Consider the diagram below.What does D represent?

Question illustration
A
energy of the products
B
energy of the reactants
C
reactants, Q + R
D
products, N + M
6

Consider the reaction pathway graph below.Which conclusion can be accurately drawn from the graph?

Question illustration
A
Hrxn for the complete reaction is negative, but Ea is positive.
Option A
B
Hrxn for the complete reaction is positive, but Ea is negative.
Option B
C
The breakdown of ozone is an exothermic process.
D
The breakdown of ozone is an endothermic process.
7

Consider the diagram below.What does C represent?

Question illustration
A
enthalpy of reaction
B
activation energy
C
activated complex
D
energy of the reactants
9

Consider the reaction pathway graph below.Which statement describes how this graph would change if the reaction could be made to go faster?

Question illustration
A
The hill would be taller.
B
The hill would be shorter.
C
C would be higher than A + B.
D
C would be equal with A + B.
10

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