Naming
# of Hydrogens
Physical properties of Alkanes
Alkane
Overall facts
100
What is the following molecule named?
Methane
100
If the molecule has 1 Carbon, how many Hydrogens would it have?
4
100
What do all alkanes end with (last 3 letters)?
-ane
100
What is the general formula for Alkane?
CNH2n+2
100
What is a hydrocarbon?
A molecule made up of carbon and hydrogen
200
What is the name of the following?
Butane
200
If the molecule has 4 Carbon, how many Hydrogens would it have?
10
200
Are alkanes heavier or lighter than water?
Lighter
200
What type of bond does an alkane have?
Single-Bond
200
What bond does an alkene have?
Double bonds
300
What is the name of the following?
Hexane
300
If the molecule has 10 Carbon, how many Hydrogens would it have? *BONUS: what would it be called?*
Answer= 22
Bonus= Decane
300
Do Alkanes dissolve in water? If no, what do they dissolve in? If yes, how quickly do they dissolve?
No, they dissolve in non-polar solvents because they are nonpolar molecules.
300
What are the different groups of Alkanes?
The groups are linear straight-chain alkanes, branched alkanes, and cycloalkanes.
300
What bond defines an alkyne?
Triple bond
400
What is the name of the following?
2-methyl hexane
400
How many Hydrogens does hexane have?
14
400
What colour are alkanes?
Colourless
400
Are alkanes saturated?
Yes
400
How many types of Aliphatic hydrocarbons are there? Bonus: What are the different types of Aliphatic hydrocarbons?
There are 3 types of Aliphatic hydrocarbons. Alkane, alkene, and alkynes
500
Name the following
4-ethyl-3-methylheptane
500
How many hydrogens does Octane have?
18
500
How do the boiling points of Alkanes change with chain size?
Bonus: how do the number of branches on alkanes affect boiling point?
As the carbon chain gets longer, there are more electrons in a molecule. This means that there are more (relatively) stronger intermolecular forces between the molecules. As a result, it takes more energy to break these forces, and thus the melting or boiling points increase.
Bonus: For isomers, the more branched the chain, the lower the boiling point tends to be.
500
How do alkanes benefit society?
They help heat our houses, move our cars, and drive our economy.
500
If there are over 26 Carbons, what is the boiling point of the alkane?
Over 400o C