Reaction Pathways — Quiz

Question 1

Which process would produce a similar pathway?

Revolt · Accepted Answer

condensation

Question 2

What does cap c represent?

Revolt · Accepted Answer

enthalpy of reaction

Question 3

A chemical reaction has triangle cap h f , reactants is equal to negative 1 comma 023 kJ and triangle cap h f , products is equal to negative 935 point 3 kJ Which graph can be used to represent this reaction pathway?

Revolt · Accepted Answer

Image with description A graph with reaction progression as the horizontal axis and Energy as the vertical axis. A line starts low on the vertical axis and runs briefly parallel to the horizontal axis. The line rises sharply and then curves down to a point just below the top of the curve and levels out. A dotted line continues from the reactants line and is labeled as negative 935 point 5 kilojoules. A dotted line continues from the product line and is labeled as negative 1023 kilojoules.

Question 4

Which statement best describes how activation energy influences a reaction?

Revolt · Accepted Answer

The greater the activation energy, the lower the reaction rate.

Question 5

Iron(II) chloride is formed from the reaction between iron and copper(II) chloride. Fe plus CuCl sub 2 rightarrow FeCl sub 2 plus Cu If the reactants have triangle cap h sub f is equal to negative 256 kJ mol inverse and the products have triangle cap h sub f is equal to negative 321 kJ mol inverse , which reaction pathway graph would have a similar shape to this reaction?

Revolt · Accepted Answer

Image with description A graph with reaction progression on the horizontal axis and energy on the vertical axis. A line starts high on the vertical axis at negative 256 kilojoules and runs level for a short distance. It rises a short distance and falls steeply to near the horizontal axis at negative 321 kilojoules; it runs parallel to the horizontal axis.

Question 6

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

Revolt · Accepted Answer

Reactants absorb a minimum amount of energy and then release a smaller amount of energy as products form.

Question 7

Which description explains the role of activation energy in a chemical reaction?

Revolt · Accepted Answer

It provides reactants with sufficient energy for bonds to break and reform.

Question 8

Reactions cannot occur without a certain minimum amount of energy. What is this minimum amount of energy called?

Revolt · Accepted Answer

the activation energy

Question 9

Which statement best describes the reaction pathway graph for endothermic reactions?

Revolt · Accepted Answer

mainly uphill

Question 10

What happens if the amount of energy that is absorbed by the reactants is less than the activation energy?

Revolt · Accepted Answer

The reaction does not occur.

Reaction Pathways — Quiz Answers

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