4.8 Covalent bond E and chem rxns

Question 0

what is the unit of measurement for bond E’s

Answer 0

kJ/mol

Question 1

define a single, double and triple bond

Answer 1

single=1 pr of shared e-‘s
double=2 pr shared e-‘s
triple=3 pr shared e-‘s

Question 2

for bonds to be broken, E must be (added/released) to the system and have a (positive/negative sign)

Answer 2

added

positive

Question 3

the (______) of a bond releases E

Answer 3

formation

Question 4

DeltaE (E change for a rxn) =

Answer 4

sum of n x D for all bonds broken MINUS sum of n x D for bonds formed
where n = number of moles
D = bond energy