Chemical Reaction Rates

Smaller particle size allows for a _________ surface area to be exposed for the reaction.

• larger

• smaller

Tags

NGSS.HS-PS1-3

Increasing the concentration of the reactants will slow down the reaction.

• false 

• true

Tags

NGSS.HS-PS1-5

What name is given to the minimum amount of energy needed by particles for them to react when they collide?

• Activation energy

• Catalytic energy

• Threshold energy

Tags

NGSS.HS-PS1-5

What is the name of the model which is used to explain how different factors affect the rate of a reaction?

• Particle theory

• Big Bang theory

• Collision theory

Tags

NGSS.HS-PS1-5

Which of the following is a possible unit for rate of reaction?

• cm³/s

• m/s

• N

Tags

NGSS.HS-PS1-5

Which of the following would speed up a reaction?

• Using lumps instead of powder

• Increasing the concentration of an acid

• Decreasing the temperature

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the following will increase the frequency of successful collisions?

• Increasing the temperature

• Decreasing the pressure

• Decreasing the concentration

Tags

NGSS.HS-PS1-5

Which of the following statements about catalysts is false?

• They speed up reactions

• They provide an alternative reaction pathway with a lower activation energy

• They become chemically changed at the end of the reaction

Tags

NGSS.HS-PS1-5

Which of the following will increase the proportion of successful collisions?

• Increasing the temperature

• Increasing the pressure

• Increasing the concentration

Tags

NGSS.HS-PS1-5

What term is used to describe a chemical reaction in which the forward and reverse reaction rates are the same?

• A static equilibrium

• An equal equilibrium

• A dynamic equilibrium

Tags

NGSS.HS-PS1-5