Alkane properties

Question 1

Difference in boiling point of longer chain and smaller chain alkanes

Answer 1

larger/longer have higher boiling point due to more London forces

Require more energy to separate the molecules so have higher boiling points

Question 2

Difference in colour of longer chain and smaller chain alkanes

Answer 2

smaller chain - light colour

longer chain - dark in colour

Question 3

Difference in flammability of longer chain and smaller chain alkanes

Answer 3

smaller alkanes easier to light

as longer chain alkanesHave higher boiling points so they are harder to evaporate and react with oxygen.

Question 4

Which alkane is more viscous

Answer 4

longer chain more viscous

shorter chain more runny

Have stronger forces which attract them together, so they are more viscous