May 4 - May 8 (Bond Energy Practice)

Breaking a chemical bond...

• requires energy

• releases energy

• is unrelated to energy

Tags

NGSS.HS-PS1-4

Forming a chemical bond...

• requires energy

• releases energy

• is unrelated to energy

Tags

NGSS.HS-PS1-4

An exothermic reaction...

• requires energy

• releases energy

• is unrelated to energy

Tags

NGSS.HS-PS1-4

An endothermic reaction...

• requires energy

• releases energy

• is unrelated to energy

Tags

NGSS.HS-PS1-4

Which of the following best describes what happens during a chemical reaction?

• Atoms always form stronger bonds.

• New atoms are added or removed to create new molecules.

• The number and type of each atom stays the same, but they rearrange to form new molecules.

• Atoms always form weaker bonds.

Tags

NGSS.HS-PS1-7

Which bond stores the least energy per mole?

• C-H

• N-H

• H-H

• C=C

Tags

NGSS.HS-PS1-4

Which bond stores the most energy per mole?

• C-H

• N-H

• H-H

• C=C

Tags

NGSS.HS-PS1-4

How much energy is required to break the bonds of the reactants?

Use the table called "Average Bond Enthalpies."

• 1367 kJ/mol

• 1852 kJ/mol

• 495 kJ/mol

• 485 kJ/mol

Tags

NGSS.HS-PS1-4

How much energy is released during the formation of the products?

Use the table called "Average Bond Enthalpies."

• 1367 kJ/mol

• 1852 kJ/mol

• 495 kJ/mol

• 485 kJ/mol

Tags

NGSS.HS-PS1-4

How much energy is required to break the bonds of the reactants?

Use the table called "Average Bond Enthalpies."

• 242 kJ/mol

• 436 kJ/mol

• 678 kJ/mol

• 862 kJ/mol

Tags

NGSS.HS-PS1-4