3.2 Alkanes

Question 1

What is an alkane

Answer 1

A saturated hydrocarbon containing C-H bonds only

Question 2

General formula of an alkane

Answer 2

CnH2n+2

Question 3

Are their bonds polar and why

Answer 3

Nonpolar - carbon and hydrogen have similar electronegativities

Question 4

Which IMF do they have

Answer 4

Van der waals as bonds are non polar

Question 5

Are they soluble in water, why

Answer 5

Insoluble because hydrogen bonds in water are stronger than the van der waals

Question 6

How reactive are alkanes

Answer 6

Very unreactive

Question 7

Which reactions will alkanes undergo

Answer 7

Combustion and reaction with halogens

Question 8

Problems with CO and C

Answer 8

co - POISONOUS
c - particulates - soot - global dimming

Question 9

How are halogenoalkanes formed from alkanes

Answer 9

Free radical substitution

Question 10

Write equations for the reaction of CH4 with Cl2 to form CH3Cl

Answer 10

Cl2 –> 2Cl.
.Cl + CH4 –> HCl + CH3.
.Ch3 + Cl2 –> Ch3Cl + Cl.

.CH3 + Cl. –> CH3Cl
2Cl. –> Cl2
.CH3 + .CH3 –> CH3CH3