(Savvas 7.3) Energy Changes in Reactions Quiz

Chemical reactions involve the breaking of chemical bonds in the reactants and the formation of chemical bonds in the __________.

• products

• elements

• compounds

• mixtures

Tags

NGSS.HS-PS1-6

Is the following sentence true or false? The formation of chemical bonds absorbs energy.

• True

• False

Tags

NGSS.HS-PS1-4

Is the following sentence true or false? The heat and light given off by a propane stove result from the formation of new chemical bonds.

• True

• False

Tags

NGSS.HS-PS1-4

The combustion of one molecule of propane (C3H8) results in the formation of __________ C=O double bonds and __________ O-H single bonds.

• 6, 8

• 3, 8

• 4, 2

• 1, 6

Tags

NGSS.HS-PS1-7

Which of the following best describes an endothermic reaction?

• A reaction that absorbs energy from the surroundings.

• A reaction that releases energy to the surroundings.

• A reaction that neither absorbs nor releases energy

• A reaction that only occurs at low temperatures

Tags

NGSS.HS-PS1-4

In a chemical reaction, what happens to the chemical bonds in the reactants?

• They are broken.

• They remain unchanged.

• They are formed.

• They are absorbed.

What is the role of energy in chemical reactions?

• It is always absorbed.

• It is always released.

• It can be either absorbed or released.

• It is not involved.

Tags

NGSS.HS-PS1-4

What is the significance of the spark from the igniter in a gas grill?

• It absorbs energy.

• It provides the energy needed to start the reaction.

• It cools down the reactants.

• It forms new chemical bonds.

Tags

NGSS.HS-PS1-4

During a chemical reaction, energy is either released or __________.

• absorbed

• created

• destroyed

• lost

Tags

NGSS.HS-PS1-4

Is the following sentence true or false? Physical and chemical changes can be either exothermic or endothermic changes.

• True

• False

Tags

NGSS.HS-PS1-4