Rates of Chemical Reactions

Why don't all collisions between particles cause a reaction?

• the particles also need to collide with a catalyst

• not all the particles collide with enough energy

• not all the particles collide at a high enough temperature

• the particles need to collide with each other twice

Tags

NGSS.HS-PS1-5

Which of the following increase the reaction rate?

• less surface area

• lower temperature

• increased concentration

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NGSS.HS-PS1-5

Catalysts permit reactions to proceed along a ___________energy path.

• lower

• higher

The minimum amount of energy needed for colliding particles to react is called

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

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

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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

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 will increase the proportion of successful collisions?

• Increasing the temperature

• Increasing the pressure

• Increasing the concentration

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