Energy & Rates of Reaction

Which of the following is not a factor which affect the rate of a chemical reaction?

• concentration

• surface area

• length

• temperature

Tags

NGSS.HS-PS1-5

As you increase the the concentration of the reactants, the rate of reaction will?

• increase

• first increase and then rapidly decrease

• decrease

• not change

Tags

NGSS.HS-PS1-5

By decreasing the surface area of the reactants, the rate of the reaction will?

• increase

• not change

• decrease

• first increase and then level off

The starting materials in a reaction are called?

• inhibitors

• catalysts

• products

• reactants

When Maltase, a substance, is added to a reaction, the reaction rate increases. Therefore, Maltase must be a?

• inhibitor

• catalyst

• acid

• mixture

Tags

NGSS.HS-PS1-5

In colder temperatures, chemical reactions happen more?

• quickly

• slowly

• temperature has no effect on rate of reaction

Tags

NGSS.HS-PS1-5

The minimum amount of energy needed in order to start a reaction is called?

• activation energy

• lock-in energy

• beginner energy

• introductory energy

When an inhibitor is added to a chemical reaction, how is the activation energy affected?

• it is lowered, speeding the reaction up

• it is raised, slowing the reaction down

• it is unaffected by the inhibitor

These types of reactions release heat energy over time?

• exothermic

• endothermic

• corrosive

• exponential

These types of chemical reactions leave the substances colder than when they started?

• exothermic

• endothermic

• oxidative

• explosive

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4