Kinetics

A catalyst works by

• changing the order of the reaction

• increasing the temperature

• lowering the activation energy

• making the activated complex

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

• Activation energy is reduced.

• Collisions become more frequent.

• Collisions become more energetic.

• Collisions become more frequent and more energetic.

Tags

NGSS.HS-PS1-4

NGSS.HS-PS1-5

The ____________ states that atoms, ions, or molecules must collide in order to react.

• transition state

• activation energy

• rate law

• collision theory

An effective collision is defined as reactant particles having

• Sufficient energy

• proper orientation

• sufficient energy and proper orientation

• none of the above

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

The rate of a chemical reaction is NOT affected by which of the following:

• temperature

• concentration

• particle size (surface area)

• All of these affect reaction rates

Tags

NGSS.HS-PS1-5

Which will increase the rate of a reaction?

• Increasing the beaker volume

• Lowering the temperature

• using smaller pieces of solid

• diltuing a solution

Tags

NGSS.HS-PS1-5

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

• Slow collision frequency

• Allow less effective collision between the particles

• Neutralise the reaction

• increase collision between the particles thus increasing the rate.

Tags

NGSS.HS-PS1-5

If the temperature is reduced, a reaction rate will ______

• increase

• decrease

• stay the same

Tags

NGSS.HS-PS1-5

If the concentration of a reactant is increased, the reaction rate will ___________.

• increase

• decrease

• stay the same

Tags

NGSS.HS-PS1-5