Unit 5 Final Review

The graph shows the change in concentration of one of the species in the reaction A + B→AB + heat. If the graph indicates reaction rate, Which of the following components of the reaction are plotted?

• A or B

• AB

• Heat

• None of the above

Tags

NGSS.HS-PS1-5

The graph shows the change in concentration of one of the species in a reaction. If the graph indicates reaction rate, Which of the following components of the reaction are plotted?

• reactants - the line is decreasing over time

• products - the line is decreasing over time

• reactants - the line is increasing over time

• None of the above

Tags

NGSS.HS-PS1-5

What does a catalyst do to a chemical reaction?

• A catalyst speeds up a chemical reaction without being consumed.
• A catalyst changes the products of the reaction.
• A catalyst lowers the activation energy, allowing the reaction to occur more easily

• A catalyst slows down a chemical reaction.

Tags

NGSS.HS-PS1-5

The graphs show a chemical reaction between reactants to form an activated complex, followed by the formation of products. During an endothermic reaction, which species of the reaction would have the lowest energy?

• reactants

• Activated complex

• Products

• Not enough information to answer.

Tags

NGSS.HS-PS1-4

The graphs show a chemical reaction between reactants to form an activated complex, followed by the formation of products. During an exothermic reaction, which species of the reaction would have the lowest energy?

• reactants

• Activated complex

• Products

• Not enough information to answer.

Tags

NGSS.HS-PS1-4

What is the energy the reactant molecules must achieve for the reaction to take place?

• Activation Energy

• Catalysis energy

• Kinetic Energy

• difference between product and reactant energy

Which of the following will slow down a reaction?

• Increasing temperature
• Adding a catalyst
• Decreasing temperature or adding an inhibitor.
• Increasing pressure

Tags

NGSS.HS-PS1-5

What does D represent in the graph?

• Energy level at the transition state
• Energy level of the products after the reaction
• Activation energy required for the reaction
• Energy level of the reactants before the reaction

Tags

NGSS.HS-PS1-4

The reaction depicted in the graph is

• spontaneous reaction
• catalytic reaction
• endothermic reaction
• exothermic reaction

Tags

NGSS.HS-PS1-4

Which of the following would increase the number of collisions without changing the energy of the reactant molecules?

• Add a catalyst to the reaction.
• Increase the volume of the reaction vessel.
• Decrease the temperature of the reaction.
• Increase the concentration of reactants.

Tags

NGSS.HS-PS1-5