Ask a Teacher

Search



While stating volume of a gas why temperature and pressure must be given.
 Stating the molar volume of a gas without indicating the reference conditions of temperature and pressure has no meaning and it can cause confusion.

The molar gas volumes can be calculated with an accuracy that is usually sufficient by using the universal gas law for ideal gases. The usual expression is:

P V = nRT

...which can be rearranged thus:

\frac{V}{n} = \frac{RT}{P} 
               
where P= the absolute pressure of the gas n=amount of substance in mol,V=the volume of the gas in m3 ,T= the absolute temperature of the gas ,R= universal gas constant (R=8.3145m3.Pa/mol.K)

 











comments powered by Disqus