covalent bond energies and chemical reactions (3.7)

Question 1

is the bond energy of a double bond twice the bond energy of a single bond?

Answer 1

NO! All bonds have the same amount of energy, only difference is how many pairs of electrons they share/transfer.

Question 2

for bonds to be broken, energy must be _____ to the system. how is this signified?

Answer 2

added. this is signified with a positive sign.

Question 3

for bond to be formed, energy must be _____ released from the system.

Answer 3

released. this is signified with a negative sign.

Question 4

what is a single bond? what is a double bond?

Answer 4

a type of bond where one pair of atoms are shared. a type of bond where two pairs of atoms are shared.

Question 5

what happens to the bond length when the number of shared electrons (a.k.a bonds) increase?

Answer 5

it shortens.