Unit 3- Collision Theory & Reaction Rates

Rank the state os matter from FASTEST to SLOWEST particle speed.

• solid, liquid, gas

• liquid, solid, gas

• gas, liquid, solid

• gas, solid, liquid

Tags

NGSS.MS-PS1-4

The higher the temperature a substance has the

• more energy it has

• less energy it has

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-4

In a solution when particles collide, most of the collisions

• are successful

• are unsuccessful

• result in a chemical reaction

• do not result in a chemical reation

Tags

NGSS.HS-PS1-5

What factors affect reaction rate?

• size of atoms

• temperature

• concentration

• surface area

• catalysts

Tags

NGSS.HS-PS1-5

A log is burning in a campfire. If the concentration of oxygen reaching the log is increased, what will happen to the reaction rate?

• reaction rate decreases

• reaction rate increases

• reaction rate remains the same

Tags

NGSS.HS-PS1-5

What is necessary for a chemical reaction to occur?

• Correct orientation of particles when they collide

• particle collisions

• an increase or decrease in temperature

• particle collisions with sufficient energy

• a catalyst

Tags

NGSS.HS-PS1-5

What happens to reaction rate if surface area is decreased?

• it increases

• it decreases

• it stays the same

What happens to reaction rate when a reactants concentration is increased?

• it increases

• it decreases

• it remains the same

Tags

NGSS.HS-PS1-5

What happens to reaction rate when temperature is decreased?

• it increases

• it decreases

• it stays the same.

Tags

NGSS.HS-PS1-5

What does a catalyst do to speed up a reaction?

• It reduces the surface area of the reactants

• It increases the surface area of the reactants.

• It reduces the required energy for a chemical reaction to occur

• It increases the required energy for a chemical reaction to occur