Hydrocarbons Intro and ALKANES

Question 1

Crude oil is a fossil fuel. How is it formed?

Answer 1

It was formed over millions of years from the remains of plankton. It is a form of biomass i.e. a resource made from living or recently living creatures.

Question 2

Crude oil is finite which means that we cannot

Answer 2

replace it if we use it up

Question 3

Crude oil is a mixture of

Answer 3

hydrocarbons

Question 4

Hydrocarbons are:

Answer 4

compounds containing hydrogen and carbon only

Question 5

What is a homologous series

Answer 5

chemicals that have the same functional group and the same ratio but go up by CH2 each time

Question 6

Alkanes are hydrocarbons which are _______ and have the general formula of ____________

Answer 6

saturated (only single covalent bonds)

CnH2n+2

Question 7

Anagram for alkanes

Answer 7

Monkeys Eat Peanut Butter

Methane, Ethane, Propane, Butane

In order of amount of carbon atoms - so methane has 1

we can use the formula CnH2n+2 to find hydrogen atoms

Question 8

What affects the property of an alkane?

Answer 8

the length of it’s carbon chain

Question 9

Small Chain vs Long Chain Alkane: boiling point

Answer 9

small = lower
long = higher

Question 10

Small Chain vs Long Chain Alkane: flammability

Answer 10

small = more flammable
long = less flammable

Question 11

Small Chain vs Long Chain Alkane:viscosity

Answer 11

small = less viscous (runny)
long = more viscous (thick and gloopy)

Question 12

The bigger the alkane molecule, the stronger the

Answer 12

intermolecular forces because there are more electrons.