Exploring Chemical Reactions and Energy

Which of the following is a characteristic of an exothermic reaction?

• It absorbs heat from the surroundings.

• It releases heat to the surroundings.

• It requires a catalyst to proceed.

• It has a high activation energy.

Tags

NGSS.HS-PS1-4

What is the term for the substances that are transformed during a chemical reaction?

• Products

• Reactants

• Catalysts

• Intermediates

Tags

NGSS.MS-PS1-2

Which of the following best describes a catabolic reaction?

• It builds larger molecules from smaller ones.

• It breaks down larger molecules into smaller ones.

• It requires energy input to proceed.

• It is always endothermic.

Tags

NGSS.HS-LS1-7

What is the role of activation energy in a chemical reaction?

• It determines the equilibrium position of the reaction.

• It is the energy required to initiate the reaction.

• It is the energy released during the reaction.

• It is the energy absorbed during the reaction.

Tags

NGSS.HS-PS1-5

Which of the following reactions is an example of an anabolic reaction?

• Photosynthesis

• Cellular respiration

• Combustion of glucose

• Hydrolysis of ATP

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

During an endothermic process, what can be said about the energy level of the products compared to the reactants?

• The products have less energy than the reactants.

• The products have more energy than the reactants.

• The products have the same energy as the reactants.

• The energy of the products is independent of the reactants' energy.

Tags

NGSS.HS-PS1-4

What is the primary difference between exothermic and endothermic reactions?

• Exothermic reactions require a catalyst, while endothermic reactions do not.

• Exothermic reactions release energy, while endothermic reactions absorb energy.

• Exothermic reactions occur only in living organisms, while endothermic reactions do not.

• Exothermic reactions are faster than endothermic reactions.

Tags

NGSS.HS-PS1-4

Which of the following equations represents an exothermic reaction?

Tags

NGSS.HS-PS1-4

In a chemical reaction, what is the term used for the substances that are formed as a result of the reaction?

• Reactants

• Products

• Catalysts

• Intermediates

Tags

NGSS.HS-PS1-6

Which one of the following does NOT speed up reaction time?

• Temperature

• Increased surface area

• Add enzymes

• More reactants

Tags

NGSS.HS-PS1-5