17.5 The Alkanes

Question 1

Way is the Alkanes homologous series, general formula?

Answer 1

CnH2n+2

Question 2

Where are Alkanes found?

Answer 2

Petroleum and natural gas

Question 3

In the Alkanes, what are the gas, liquids and solids?

Answer 3

The first 4 Alkanes are gas. (At room temp)
The next 12 are liquid. So from 1-18 are gases and liquids. In the Alkanes
The rest are solid.

Question 4

Are Alkanes saturated or unsaturated?

Answer 4

Saturated

Question 5

Generally Alkanes are quite _______.

Answer 5

Un reactive

Question 6

Do Alkanes burn in O2?

Answer 6

Yes, in a good supply the form CO2 and H2O + Heat (energy) So they are used as fuels. The shorter the chain of carbons the faster it burns.

Question 7

If there is not enough to O2, what combustion undergoes?

Answer 7

Incomplete combustion giving CO, H2O and a little heat (energy)

Question 8

What is the reaction of Cl2 with Alkanes called? And what type of reaction is it?

Answer 8

Substitution.

Photochemical reaction. (Sun)Light is needed.

Question 9

What is an isomer? What types of chains are there?

Answer 9

Compounds with the same formula but different structures. There are straight and branched chains.