Hydrocarbons

Question 1

What are alkanes

Answer 1

The simplest type of hydrocarbon

Question 2

General formula of alkanes

Answer 2

CnH2n+2

Question 3

What is a homologous series

Answer 3

A group of organic compounds that react in a similar way

Question 4

What are saturated compounds

Answer 4

Each carbon atom forms four single covalent bonds

Question 5

Are alkanes a saturated compound

Answer 5

Yes

Question 6

What are the first 4 alkanes

Answer 6

Methane, ethane, propane, butane

Many
Ethical
People
Breath

Question 7

What are the displayed formulas for the first four alkanes

Answer 7

Methane: CH4
Ethane:C2H6
Propane:C3H8
Butane:C4H10

Question 8

Properties of hydrocarbons

-the shorter the chain the less v… (runny) it is, the l… the more …
-shorter hydrocarbons are more … (lower … points)
-the shorter the chain the more f… is it

Answer 8

-the shorter the chain the less viscous (runny) it is, the longer the more viscous
-shorter hydrocarbons are more volatile (lower boiling points)
-the shorter the chain the more flammable is it

Question 9

What are hydrocarbons

Answer 9

Any compound formed from only carbon and hydrogen atoms

Question 10

Volatile meaning

Answer 10

Lower boiling point

Question 11

Viscous meaning

Answer 11

The more gloopy and thick

Question 12

What are hydrocarbons used for, what type and why

Answer 12

-fuels
-shorter alkanes
-because they flammable and less viscous

Question 13

What does the complete combustion of any hydrocarbon in oxygen release

Answer 13

Lots of energy

Question 14

Word equation for complete combustion

Answer 14

Hydrocarbon + oxygen-> carbon dioxide + water

Question 15

What happens when hydrocarbons undergo complete combustion

Answer 15

-both carbon and hydrogen are oxidised