C7: ALKANES

Question 1

What are alkanes?

Answer 1

hydrocarbons with single bonds

Question 2

What are the first 4 alkanes?

Answer 2

-methane
-ethane
-propane
-butane

Question 3

What are the molecular formulae of the first 4 alkanes?

Answer 3

-methane - CH4
-ethane - C2H6
-propane - C3H8
-butane - C4H10

Question 4

What is the difference between complete and incomplete combustion?

Answer 4

-complete combustion takes place in the presence of a sufficient amount of oxygen
-incomplete combustion reaction takes place when there is an insufficient amount of oxygen

Question 5

What is the word equation for the complete combustion of methane?

Answer 5

methane + oxygen –> carbon dioxide + water +energy

Question 6

What is the word equation for the incomplete combustion of methane?

Answer 6

methane + oxygen –> carbon monoxide + water + energy
or
methane + oxygen –> carbon particulates + water + energy

Question 7

During combustion what happens to the carbon and hydrogen in the fuels ?

Answer 7

Oxidised