Editing Molar volume (section)

{{Short description|Volume occupied by a given amount of particles of a substance}}
{{Infobox physical quantity
| bgcolour = {default}
| name = Molar volume
| unit = m<sup>3</sup>/mol
| otherunits = dm<sup>3</sup>/mol, cm<sup>3</sup>/mol
| symbols = ''V''<sub>m</sub>, <math>\tilde V</math>
| dimension = '''L'''<sup>3</sup> '''N'''<sup>−1</sup>
}}

In [[chemistry]] and related fields, the '''molar volume''', symbol ''V''<sub>m</sub>,<ref name="GreenBook">{{GreenBookRef2nd|page=41}}</ref> or <math>\tilde V</math> of a substance is the ratio of the [[volume]] (''V'') occupied by a substance to the [[amount of substance]] (''n''), usually at a given [[temperature]] and [[pressure]]. It is also equal to the [[molar mass]] (''M'') divided by the [[mass density]] (''ρ''):
<math display="block">V_{\text{m}} = \frac{V}{n} = \frac{M}{\rho}</math>

The molar volume has the [[SI unit]] of [[cubic metre]]s per mole (m<sup>3</sup>/mol),<ref name="GreenBook"/> although it is more typical to use the units [[cubic decimetre]]s per mole (dm<sup>3</sup>/mol) for [[gas]]es, and [[cubic centimetre]]s per mole (cm<sup>3</sup>/mol) for [[liquid]]s and [[solid]]s.