Lecture 2 – Molar Gas Volume

Molar Gas Volume:

Molar gas volume is defined as the volume occupied by 1 mole of a gas a Room Temperature & Pressure (R.T.P). It is equal to 24dm³.

The unit dm³:

1m³ = 1000 dm³ = 1000000cm³

1dm³ = 1000 cm³

1cm³ = 1/1000 dm³

1dm³ = 1 liter

Table 3:

Symbol	Mole	Mass in g = Mr of the compound	Volume at R.T.P in dm3	Number of molecules	Number of Particles
O2	1	32	24	6.02 x 1023 molecules of O2	2 x 6.02 x 1023 atoms of O
Ne	1	20	24	6.02 x 1023 atoms of Ne	6.02 x 1023 atoms of Ne
CO2	1	44	24	6.02 x 1023 molecules of CO2	6.02 x 1023 atoms of C & 2 x 6.02 x 1023 atoms of O
NH3	1	17	24	6.02 x 1023 molecules of NH3	6.02 x 1023 atoms of N & 3 x 6.02 x 1023 atoms of H