Activation Energy

What is the activation energy?

• The energy of the products

• The energy of the reactants

• The minimum energy needed by the reactants to form the products.

• The energy lost in the reaction

Tags

NGSS.HS-PS1-5

How does a catalyst work in speeding up a reaction?

• By lowering the activation energy or reaction

• by giving them more energy

• by making them more available

Tags

NGSS.HS-PS1-5

What letter represents the energy of the products?

• A

• B

• C

• D

Tags

NGSS.HS-PS1-4

NGSS.HS-PS3-1

According to collision theory, what must the reactants have in order to form products?

• The right size

• The right shape

• Enough energy

• Nothing

Many of the proteins in the human body are enzymes that catalyze chemical reactions. What is the relationship between enzymes and activation energy?

• When an enzyme catalyzes a reaction, it increases the activation energy of the reaction

• When an enzyme catalyzes a reaction, it increases the activation energy of the product.

• When an enzyme catalyzes a reaction, it decreases the activation energy of the reaction.

• When an enzyme catalyzes a reaction, it does not affect the activation energy of the

  reaction

Many of the proteins in the human body are enzymes that catalyze chemical reactions. What is the relationship between enzymes and activation energy?

• When an enzyme catalyzes a reaction, it increases the activation energy of the reaction

• When an enzyme catalyzes a reaction, it increases the activation energy of the product.

• When an enzyme catalyzes a reaction, it decreases the activation energy of the reaction.

• When an enzyme catalyzes a reaction, it does not affect the activation energy of the

  reaction

What is the relationship between enzymes and activation energy?

• When an enzyme catalyzes a reaction, it increases the activation energy of the reaction

• When an enzyme catalyzes a reaction, it increases the activation energy of the product.

• When an enzyme catalyzes a reaction, it decreases the activation energy of the reaction.

• When an enzyme catalyzes a reaction, it does not affect the activation energy of the

  reaction

Tags

NGSS.HS-PS1-4

The activation energy needed for a chemical reaction is decreased by a

• catalyst

• reactant

• product

• substrate

Enzymes ___________________ activation energy to speed up chemical reactions.

• increase

• decrease

What type of reaction is this?

• Endothermic

• Exothermic

Tags

NGSS.HS-PS1-4