4.12 Alkanes

Question 1

Alkanes are joined together by

Answer 1

sigma bonds meaning they can rotate.

Question 2

Boling point trends in alkanes

Answer 2

the boiling point increases due to the increasing strength of the London forces hold the molecules together.

Question 3

Branched alkanes - boiling point trends

Answer 3

More branching means less surface area of contact meaning weaker London forces

Question 4

Reasons for limited reactivity

Answer 4

C - C and C - H bonds are strong, C - C bonds are not polar, the electronegativity of H and C are so similar that they can be considered to be non-polar.

Question 5

The three stages of radical substitution

Answer 5

Initiation, propagation, termination.