Functional Groups and Homologous Series Flashcards Preview

Chemistry 6 - Organic Chemistry > Functional Groups and Homologous Series > Flashcards

Flashcards in Functional Groups and Homologous Series Deck (11)
1

what is a functional group

an atom or a group of atoms that give a compound some distinct and predictable properties

2

what is the functional group of alcohols and carboxylic acids

- OH
- COOH

3

what is a homologous series

- a set of compounds with the same functional group
- that therefore have similar chemical and physical properties that show a gradation
- and have the same general formula

4

what is a gradation

a gradual change from one to the next

5

what homologous series are mainly used as fuels

alkanes

6

what is the general formula of an alkane

CnH2n+2

7

what is the general formula of an alkene

CnH2n

8

what is the general formula of a halogenoalkane

CnH2n+1X (C2H5Br or CH3CH2Br)

9

what is the general formula of an alcohol

CnH(2n+1)OH

10

what are the products of completely burning an alkane or hydrocarbon in air (oxygen)

hydrocarbon + oxygen = water + carbon dioxide

11

what is the trend in the boiling point across the alkanes as the carbon chain length increases

- the boiling point increases
- longer chain length and more atoms results in stronger intermolecular forces of attraction holding the hydrocarbon together
- which requires more energy to overcome