Rates of reaction

Which factors affect the rate of a reaction?

• temperature

• concentration

• surface area

• pressure

• catalyst

Tags

NGSS.HS-PS1-5

Why does a higher concentration increase the rate of reaction?

• it increases the amount of reactants

• it lowers the activation energy

• it increases the energy of particle collisions

• it increases the frequency of particle collisions

Tags

NGSS.HS-PS1-5

Why does a higher temperature increase the rate of a reaction?

• it increases both the frequency and energy of particle collisions

• it only increases the frequency of particle collisions

• it only increases the energy of particle collisions

• it reduces the activation energy of the reaction

Tags

NGSS.HS-PS1-5

Increasing the temperature gives particles more __________.

• Time

• Energy

• Space

• Frequency

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NGSS.HS-PS1-5

As the frequency of ______________ increases, the rate of reaction increases.

• Time

• Reactions

• Collisions

• Reactants

Tags

NGSS.HS-PS1-5

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

• Chemical Energy

• Kinetic Energy

• Activation Energy

• Potential Energy

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NGSS.HS-PS1-4

The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off? 

• A
• B
• C
• D

Icing sugar has a greater ______ _____ than a solid cube of

sugar.

• Surface Area

• Catalyst

• Temperature

Tags

NGSS.HS-PS1-3

Identify where the reaction has finished

• A
• B
• C
• D

Order the letters from highest to lowest rate of reaction.

• A > B > C > D
• A > BC > D (B and C have the same rate)
• A > B > CD (C and D have the same rate)
• D > C > B > A

Tags

NGSS.HS-PS1-5