PHYSICAL SCIENCE WEEK 5

What is collision theory?

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

• Molecules need enough energy to collide and reac

• Atoms constantly collide and react.

• The minimum energy needed for atoms to react

FACT or BLUFF

When you lower the temperature, the molecules are slower and collide less.

• FACT

• BLUFF

• none of the above

FACT or BLUFF

When you raise the temperature of a system, the molecules is not affected.

• FACT

• BLUFF

• none of the above

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

• Not affect the rate of reaction.

• Slow down the rate of reaction

• Speed up the rate of reaction

• Is consumed by the reaction

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

• Fakse

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

FACT or BLUFF

If the collisions did not meet the conditions, the collision will fall under the ineffective collision category and no reaction will occur as they will just bounce off with one another.

• FACT

• BLUFF

• none of the above

It is used to predict the rates of chemical reactions, particularly for gases.

• Particle Theory

• Catalyst Theory

• Collision Theory

• Activitation energy

The collisions which bring about a chemical reaction are called: 

• TrueConsistent collisions

• Effective collisions 

•  Normal collisions 

• None of the above

therefore the higher the concentration, the faster the reaction rate,

• TRUE

• FALSE

• None of the above