The Relationship Between Volume and Amount Avogadros Law

This experimental result shows that twice the amount (mol) of gas occupies twice the volume. Notice that, for both cylinders, the T of the gas equals room temperature and the P of the gas equals atmospheric pressure. Thus, at fixed 

As n increases, V increases, and vice versa. This relationship is also expressed as 

The constant is the same for all gases at a given temperature and pressure. This relationship is another way of expressing Avogadro s law, which states that at fixed temperature and pressure, equal volumes of any ideal gas contain equal numbers of particles (or moles). 

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