1. Two types of the most used hydrocarbon gas mixtures are liquefied petroleum gas (LPG) and natural gas (NG). Table 1 compares the selected physical and chemical properties of both fuels.

Table 1 Selected physical and chemical properties of LPG nd NG

Properties	LPG	NG
Specific Gravity	~ 1.65	~ 0.55
Boiling point (oC)	- 42	-163
Higher Heating Value (kcal/Sm3)	~ 28,000	~ 9500
Lower /Upper Flammability Limit in Air (vol% fuel)	1.5/8.5	5/15
Ignition Temperature (oC)	~510	~650

For each of the following gas sectors, compare each of the LPG and NG properties and evaluate its effects with respect to the following applications;

1. Hydrocarbon gas transportation and storage ( 4 Marks)
2. Hydrocarbon gas utilization ( 4 Marks)
3. Hydrocarbon gas safety ( 5 Marks)