Alkanes

Question 1

Are alkanes saturated or unsaturated hydrocarbons?

Answer 1

Saturated hydrocarbons

Question 2

What happens to the boiling point of an alkane as chain length increases?

Answer 2

Boiling point increased as London forces increase so require more energy to overcome

Question 3

How do side chains effect intermolecular forces?

Answer 3

Make London forces weaker so less energy is require to overcome them

Question 4

What is a sigma bond?

Answer 4

Direct overlap of orbitals which are very strong

Question 5

Name some properties of alkanes

Answer 5

Non polar
Similar electronegativities
High bond enthalpy

Question 6

What are the 3 stages of free radical substitution?

Answer 6

Initiation
Propagation
Termination

Question 7

Write out the free radical reaction for methane Reacting with bromine

Answer 7

Initiation Br2 > 2Br.

Propagation CH4 + Br. > CH3. + HBr
CH3. + Br2 > CH2Br + Br.

Termination CH3. + CH3. > C2H6
Br. + Br. > Br2
CH3. + Br. > CH3Br

Question 8

Can you have multiple propagation stages?

Answer 8

Yes

Question 9

What does incomplete combustion produce?

Answer 9

Carbon monoxide and water

Question 10

What does com0lete combustion produce?

Answer 10

Carbon dioxide and water

Question 11

What is the general formula for an alkane?

Answer 11

CnH2n

Question 12

What is the general formula for an alkane?

Answer 12

CnH2n+2