Collision Theory and Reaction Rates

Which of the following would give a steeper curve on a graph of volume of gas against time?

• Low temperature

• Low concentration

• Using a catalyst

Tags

NGSS.HS-PS1-5

The major theory of reaction rate is called

• Collision theory

• Crash theory

• Newton's laws

• Thermodynamics

Tags

NGSS.HS-PS1-5

What is the energy of the activated complex?

• 75 kJ

• 225 kJ

• 300 kJ

• 225 kJ

Tags

NGSS.HS-PS1-4

Increase in temperature of the reactants can do one of the following

• Slow collision frequency

• Allow less effective collision between the particles

• Cause particles to lose speed

• Increase collision between the particles thus increasing the rate.

Tags

NGSS.HS-PS1-5

Which factors increase the rate of a reaction.

• increasing temperature

• increasing concentration

• increasing surface area

• all of these

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

In which experiment is the rate of reaction between hydrochloric acid and calcium carbonate slowest?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-5

What letter represents the activation energy?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

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

• The energy needed for a reaction to occur

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

• The energy added by a catalyst

• The energy possessed by the products

Grinding a seltzer tablet into powder increases the rate of reaction due to increased

• concentration

• surface area

• temperature

• reactants