Catalysts and Activation Energy

What has to happen before a reaction takes place?

• Product molecules must collide

• Product molecules must collide with enough power

• Reacting molecules must collide with enough energy

• Molecules must collide with enough power

Explain how increasing concentrations increases the rate of a reaction

• Less collisions occur

• More movement

• More collisions occur

• Less movement

Tags

NGSS.HS-PS1-5

What change in condition increases the speed of the reacting molecules?

• Decreasing temperature

• Increasing temperature

• Decreasing energy

• Increasing power

Tags

NGSS.HS-PS1-5

How can you increase the surface area of a solid?

• Divide the solid into smaller pieces

• Get more solid

• Turn it into a gas

Which change in condition only affects reactions involving gases?

• Temperature

• Surface area

• Pressure

• Concentration

Tags

NGSS.HS-PS1-6

What is the activation energy in a reaction?

• The energy needed for products to be formed

• The energy needed to break products into reactants

• The minimum energy needed to make products

• The minimum energy needed by reactants for them to react

What does a catalyst do?

• Speeds up reactants

• Speeds up a chemical reaction

• Speeds up products

• Speeds up particles

Tags

NGSS.HS-PS1-5

What do you call a biological catalyst?

• Product

• Reactant

• Biological reaction

• Enzyme

What is/are the catalyst(s) in catalytic converters in cars?

• Platinum

• Phosphorous

• Palladium

• Phosphorous and platinum

• Platinum and palladium

Tags

NGSS.HS-PS1-1

The graph that shows how catalysts lower activation energy is known as what?

• Reaction profile

• Energy graph

• Catalysing reaction graph

• Overall change of energy grapg

Tags

NGSS.HS-PS1-4