# LP conversation

J

#### Jeff

Would be possible from to supply me with the calculation converting kg of LP to
cubic meters?

or cubic meters of propane gas to kg of liquid.

Best Regards

D

#### david mertens

The Ideal Gas Law is a combination of Boyle's Law, Charles' Law and Avogadro's Law. It can be expressed by a single equation, PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the general gas constant, and T is
the absolute temperature.

The value of the gas constant, R is 8.3143 J K-1 mol-1. Note that these are SI units, and therefore the volume used in this equation must be in m3and the pressure in N-2. In all gas law calculations, absolute values of temperature
(Kelvin) must be used.

Another commonly encountered value for R is 0.08205 atm dm3 K-1 mol-1. If this value is used then the volume must be in dm3 and the pressure in atm.

One Mole is the amount of any substance that contains as many particles as there are carbon atoms in 12 g of carbon-12. Some care is needed. 58.5 g of sodium chloride is the mass of one mole of this substance. However, it is ionic, and 1 mole consists of 1 mole of Na+ ions and 1 mole of Cl- ions. This is two moles of ions in total.

To consider the masses of molecules measured in grams, for example, would be to deal inconveniently with extremely small numbers. Rather, the mass of a molecule is compared with that of an atom of carbon-12. The relative atomic
mass of carbon-12 is taken to be 12. Relative masses have no units because they have cancelled in their calculation. A relative molecular mass can be calculated easily by adding together the relative atomic masses of the constituent atoms. For example, ethanol, CH3CH2OH, has a Mr of 46.