DF8

Calculations with gases

• 1dm³ = 1000cm³

• 1cm³ = 1\(\times\)10^-6m³

• 1dm³ = 1\(\times\)10^-3m³

• A mole of a gas has 6.02\(\times\)10²³ molecules

• Equal volumes of gases at the same temperature and pressure contain an equal number of molecules

• At S.T.P, the molar volume of any gas is 22.4dm³

• At R.T.P, the molar volume of any gas is 24.0dm³

The Ideal Gas equation

\[PV=nRT\]

• Pressure, \(P\), in Pa

• Volume, \(v\), in m³

• Amount of gas, \(n\), in moles

• The gas constant, \(R\), 8.31JK^-1mol^-1

• Temperature, \(T\), in K