1) What is a hydrocarbon?
2) What bonds are involved in hydrocarbons?
3) What is an alkane?
4) The first alkane is methane (CH4). Draw the displayed formula for methane.
5) What is the general molecular formula for alkanes (the formula with n in it)?
6) Write down the names and molecular formulas for the first 4 alkanes.
7) Draw the displayed formula for propane.
8)
a) What would be the molecular formula for an alkane with 7 carbons in?
b) What would be the molecular formula for an alkane with 15 carbons in?
c) What would be the molecular formula for an alkane with 23 carbons in?
d) What would be the molecular formula for an alkane with 31 carbons in?
9) Say whether the hydrocarbons below are alkanes.
a) C5H12
b) C12H24
c) C19H36
d) C24H50
10) Do shorter or longer hydrocarbons have higher melting & boiling points? Explain your answer.
11)
a) What does flammability mean?
b) Are shorter or longer hydrocarbons more flammable?
12)
a) What does viscosity mean?
b) Out of golden syrup and water, which is more viscous?
c) Out of shorter and longer hydrocarbons, which are more viscous?
13)
a) What does volatility mean?
b) Which are more volatile out of shorter and longer hydrocarbons?
14) We have the two alkanes below:
> Alkane A – C10H22
> Alkane B – C40H82
a) Which alkane will have the higher melting & boiling point? Explain your answer.
b) Which alkane is less viscous? Explain your answer.
c) Which alkane is less flammable? Explain your answer.