PROPERTIES OF HYDROCARBONS

Question 1

name the first 4 alkanes

Answer 1

methane
ethane
propane
butane

Question 2

what happens to the viscosity of hydrocarbon molecules as their size increases

Answer 2

as the size of the hydrocarbon molecules increase the molecule get more viscous (LONG CHAIN HYDROCARBONS ARE VERY VISCOUS)

Question 3

what does flammability tell you about a hydrocarbon

Answer 3

how easily the hydrocarbon combusts (burns)

Question 4

what happens to the flammability of hydrocarbon molecules as their size increases

Answer 4

as the size of the hydrocarbon molecules increase the molecules get less flammable (long chain hydrocarbons are difficult to burn)

shorter chain hydrocarbons are the most flammable

Question 5

define boiling point

Answer 5

the temperature at which a liquid turns into a gas

Question 6

why are the first 4 alkanes gases at room temperature

Answer 6

they all have boiling points that are lower than room temperature

Question 7

what happens to the boiling point of hydrocarbon molecules as their size increases

Answer 7

as the size of the hydrocarbon molecules increase the molecules’ boiling point also increases
so very long-chain hydrocarbons have very high boiling points