Chapter 6

Question 1

Calculating heat of reaction

Answer 1

Bonds broken(total molecule not part)-bonds formed

Question 2

Exothermic vs endothermic

Answer 2

DeltaH >0 endothermic

Question 3

Spontaneous given direction written

Answer 3

If deltaH is <40 kj/mol
It is uncertain

Otherwise

Delta S=total moles of reactant-totals moles of product

If deltaS =0 and deltah >[40] then spontaneous

Question 4

Reaction energy diagram

Answer 4

Activation energy
From letter to highest point after letter

Overall energy change
Total displacement from one letter to another

Faster step
Shortest distance from letter to transition state

Transition states are the peaks

Delta g+- if the graph ends higher than it started it’s positive

Question 5

Addition reaction mechanism

Answer 5

Double bond disappears and added compound turns into one side of double bond

Question 6

Given deltaH and deltaS
Endo vs exo
Spontaneous vs non
Keq <1 >1 =1

Answer 6

deltaH less than 0 exo
deltaH greater than 0 endo

DeltaG less than 0 spon
Delta G greater than 0 non

DeltaG less than 0 spon

DeltaG less than 0 spon
DeltaG less than 0 spon

Question 7

Addition reaction

Answer 7

Combination of two molecules

Question 8

Elimination reaction

Answer 8

One reactant multiple products

Question 9

Substitution reaction

Answer 9

2 reactants 2 products

Question 10

Rearrangement reaction

Answer 10

One product one reactant

Question 11

Electrophile

Answer 11

Reactant with positive charge
Incomplete octet

Question 12

Nucleophile

Answer 12

Reactant with Lone pair connects to positively charged molecule

Question 13

Calculate deltaG given DeltaH and DeltaS

Answer 13

TDeltaS-DeltaH=DeltaG