Properties

Question 1

what happens to boiling point as alkane chain length increase and why?

Answer 1

• boiling point increases
• number of e- increases
• points of contact increases
• more LDFs between alkane molecules

Question 2

what does branching do to the boiling point of alkanes?

Answer 2

• branching decreases boiling point
• less points of contact/branches get in the way
• fewer LDFs between alkane molecules

Question 3

alkane solubility and why

Answer 3

• alkanes are insoluble
• alkanes are non-polar, water is polar
• alkanes form LDFs
• water forms H bonds
• LDFs are not strong enough to overcome the H bonds between water molecules so will not surround themselves with them