Rate of Reaction and Collision Theory

What is collision theory?

• Molecules must collide in the correct orientation with enough energy to bond.

• Molecules need enough energy to collide and react.

• Atoms constantly collide and react.

• The minimum energy needed for atoms to react

Tags

NGSS.HS-PS1-5

What is the rate of reaction?

• How much energy is needed for a reaction to occur.

• The energy required to break a bond.

• The time it takes for a reaction to occur.

• Collision Theory

Tags

NGSS.HS-PS1-5

What is the purpose of a catalyst?

• Helps to slow down a reaction

• Raises the activation energy

• Lowers the activation energy

• Is consumed by the reaction

Tags

NGSS.HS-PS1-5

What factors effect rate of reaction?

• Temperature, Concentration, Pressure and Energy

• Surface Area, Concentration, Energy and Pressure

• Temperature, Pressure, Concentration and Surface area

• Pressure, Surface area, Density and Energy

Tags

NGSS.HS-PS1-5

Increasing the temperature of your solution will.......

• Not affect the rate of reaction.

• Speed up the rate of reaction

• Slow down the rate of reaction

Tags

NGSS.HS-PS1-5

Decreasing the concentration of a substance will usually........

• Slow down the reaction

• Speed up the reaction

• Have no affect on the reaction

Tags

NGSS.HS-PS1-5

Which has more surface area?

• Large chunks of chalk

• Cube of sugar

• Powdered sugar

• Small chunks of sugar

If the reactant particles collide with less than the activation energy, the particles will be rebound, and no reaction will occur.

• True
• False

Tags

NGSS.HS-PS1-5

With the increase in temperature, the average kinetic energy of the molecules increases, leading to a decrease in number of collisions per unit time.

• True
• False

Tags

NGSS.HS-PS1-5

More collisions correspond to a: 

• Faster reaction rate  
• Slower reaction rate
• Constant reaction rate 
• None of the above

Tags

NGSS.HS-PS1-5