changing the order of the reaction

Which of the following best describes why increasing temperature increase reaction rate?

Collisions become more frequent and more energetic.

Collisions become more frequent.

Collisions become more energetic.

Activation energy is required to start a chemical reaction. What is activation energy?

The minimum amount of energy needed for a reaction to potentially occur

The energy needed for a reaction to occur

The energy possessed by the products

The following graph shows two different reaction pathways for the same overall reaction at the same temperature. Which pathway is slower and why?

Red, because the activation energy is larger

Blue, because the activation energy is lower

both reaction progress at the same rate

Decreasing the particle size increases the reaction rate because

It increases the surface area of the reactants thus more particles collides with each other therefore increase the frequency of effective collisions

It increases the likelihood of collisions with the correct geometry

It decreases the surface area available to react

Collision theory states that....

reaction rate increases when particles collide more

reaction rate is not affected by collisions

reaction rate increases as there are fewer collisions

there is no relationship between collisions and reaction rate.

Which group of particles shows that increasing surface area increases collisions among particles?

Cannot be determined by either picture

Products will form faster if____________

concentration of the reactants are increased.

the particle size of the reactants are larger.

Which is the best example that something has kinetic energy?

b. a tennis ball rolling across the court

a. a car parked on a steep hill

c. a picture hanging on the wall

d. a piece of coal before it's burned

Kinetics & Thermodynamics

Authored by Emily Metzger

Chemistry

9th - 12th Grade

NGSS covered

Used 30+ times

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35 questions

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MULTIPLE SELECT QUESTION

1 min • 1 pt

Which of the following increase the reaction rate?

less surface area

lower temperature

increasing pressure

increased concentration

Tags

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Will grinding up a solid increase or decrease the rate of reaction?

increase

decrease

Tags

NGSS.HS-PS1-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an exothermic reaction, heat is ...

a reactant

a product

Tags

NGSS.HS-PS3-1

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What kind of reaction is this?

Endothermic

Exothermic

Cannot be determined

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

__________ is stored energy.

Potential

Kinetic

None of the above

All of the above

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

If ∆H is negative, the reaction is?

exothermic

endothermic

Tags

NGSS.HS-PS1-4

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

ΔH value in an endothermic reaction is a positive number.

True

False

Tags

NGSS.HS-PS3-1

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Kinetics & Thermodynamics

Which of the following increase the reaction rate?

Will grinding up a solid increase or decrease the rate of reaction?

In an exothermic reaction, heat is ...

What kind of reaction is this?

__________ is stored energy.

If ∆H is negative, the reaction is?

ΔH value in an endothermic reaction is a positive number.

Temperature is a measure of average ______ energy of individual atoms.

Which phase of matter has the greatest motion and least orderly arrangement?

A catalyst works by

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