Chapter 19 -Reactions of organic compounds

Question 1

Combustion of alkanes

Answer 1

Alkane + Oxygen –> Carbon Dioxide + Water

Question 2

Substitution reaction

Answer 2

Reaction where atoms are replaced by different atoms without changing the molecule’s structure
CH4 + Cl2 –> CH3Cl + HCl

Question 3

Substitutions with Chlorine

Answer 3

e.g.
Chlorine + methane –>
Chloromethane + Hydrochloric acid

Question 4

Photochemical reaction

Answer 4

Reaction where activation energy required is produced by light

Question 5

Fractional distillation

Answer 5

Used to separate liquids with different boiling points

Question 6

Catalyctic cracking

Answer 6

Breaks long chains of alkanes into shorter chains of alkenes and alkanes

Question 7

Cracking Decane gives you

Answer 7

Ethene and Octane

Question 8

b.p.’s of hydrocarbons

Answer 8

shorter hydrocarbon chains = lower boiling points

Question 9

Shorter hydrocarbons are…

Answer 9

More flammable

Question 10

Cracking

Answer 10

Thermal decomposition reaction
(breaking down compounds by heating)

Question 11

Bromine water + Alkene solution

Answer 11

Colourless ( it reacts cuz alkenes arent saturated)

Question 12

Bromine water + alkane

Answer 12

Brown (Its saturated so it wont react)

Question 13

Polymers are made from

Answer 13

Alkenes

Question 14

ethene +steam

Answer 14

Ethanol

Question 15

Conditions for making ethanol?

Answer 15

300 degrees celcius, 600kPa , phosphoric acid

Question 16

metal + carboxylic acid

Answer 16

e.g.
(metal) ethanoate
(metal) butanoate

Question 17

carboxylic acid + base

Answer 17

e.g.
Ethanoic acid + sodium hydroxide –> Sodium ethanoate + water

Question 18

Carboxylic acid+ Alcohol + Catalyst

Answer 18

Ester