homologous series

Question 1

hydrocarbon

Answer 1

compounds containing hydrogen and carbon

Question 2

homologous series

Answer 2

family of carbon based compounds with same general formula and similar chemical properties

Question 3

alkanes

Answer 3

used as fuel, insoluble, no more of 8 C, single bonds, saturated

Question 4

alkanes formula

Answer 4

Cn H2n+2

Question 5

organic chemistry

Answer 5

the chemistry of carbon compounds

Question 6

combustion reaction

Answer 6

when substance reacts with oxygen releasing energy (exothermic)

Question 7

exothermic reaction

Answer 7

reaction which releases energy by light/heat

Question 8

experiment used to test whether compound is saturated or unsaturated

Answer 8

bromine solution - if solution decolourises there are unsaturated compunds present (alkenes) - the double bonds are responsible for the decolorisation

Question 9

alkenes

Answer 9

unsaturated, double carbon bonds, insoluble, used to make polymers and alcohol, no more than 8 C

Question 10

alkenes formula

Answer 10

CnH2n

Question 11

what chemical reactions take place in alkenes + examples

Answer 11

addition reactions

Question 12

functional group

Answer 12

part of molecule which gives molc its chemical properties

Question 13

cycloalkanes

Answer 13

saturated, single carbon bonds, ring of carbons, starts at 3 C, insoluble, orange colour remains in bromine solution, used as fuels and solvents

Question 14

combustion of cyclohexane

Answer 14

cyclohexane + oxygen —-> water + carbon dioxide

Question 15

physical properties

Answer 15

• something you can measure eg. melting and boiling point
• physical properties change as carbon molc increase

Question 16

when the number of carbon atoms increase…

Answer 16

boiling point increases because larger forces of attraction between molc (intermolecular forces)

Question 17

isomers

Answer 17

molc with same molecular formula but different structural formula

Question 18

straight chain molecule

Answer 18

when all carbon atoms lie in a line

Question 19

branched chain molc

Answer 19

alkyl groups

Question 20

physical properties of isomers

Answer 20

different mp and bp because of the forces acting between molecules (intermolecular forces)

Question 21

addition reaction

Answer 21

double bond in alkene breaks down changing into single bond and bromine adds onto carbon atoms