Future lies beneath seabed

1.	a) To which group of hydrocarbons does methane belong?
  	b) What is the chemical formula of methane?

2.	a) Given the following melting and boiling points (Cº) suggest a reason
	why propane and butane are normally used as portable fuel supplies
	rather than methane.
		GAS		 MPt		   BPt
		methane	-183		-162.0
		ethane	-172		  -88.5
		propane	-187		  -42.0
		butane	-138	  	     0.0
	b) What is the name of the next member of the homologous series above?
	Predict its likely MPt & BPt and then check your answer in a data book.
	c) What conditions exist under the seabed which cause methane to solidify?

3.	What are the main products of complete combustion of hydrocarbon
	fuels such as methane?