# Natural gas energy density ***

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# Natural gas energy density

Energy density: It is the amount of energy stored in a given system or region of space per unit volume or mass. Often only the useful or extractable energy is measured, which is to say that chemically inaccessible energy such as rest mass energy is ignored.

It has the same physical formula as pressure. Thus technically it may be called as pressure too.

Sometimes people use the word specific gravity instead of density. Which is incorrect. Energy density is the amount of energy stored per unit volume. Whereas specific gravity is the ratio of the given volume of material to the weight of the same volume of water. Density has its own unit. Whereas specific gravity has no units.

### Natural gas energy density

At standard pressure (0.1013 mPascal) and temperature (293 K) , the density of natural gas is 0.717 kg/m3. Natural gas contains methane, nitrogen, oxygen and various other constituents. Methane is the key constituent of natural gas. To find out what are the various percentage of components present in the natural gas, various experiments are conducted and various formulas are used.

Gas density depends on two factors:

• Temperature
• Pressure

### Natural gas energy density

Gas density can be measured in two ways:

• Absolute units (g/m3)
• Relative units.

At pressure 0.1 mPascal and temperature 0oc, the gas density is 1000 times less that fluid density.

Relative gas density is the ratio of gas density at standard pressure and temperature to the air density at the same standard pressure and temperature values. Normally, it does not have any units.

### Natural gas energy density 