Volume and Moles Avogadros Law

A volume of gas is confined to a cylinder witti a freely moveable piston at one end. If you apply enough heat to double the Kelvin temperature of tire gas, 

Since V on n, then V/n = Constant. If the number of moles increases, then the volume Increases In direct proportion so that the quotient, V/n, Is always equal to the same constant. Thus, for two different measurements, we can say that 

When the amoimt of gas in a sample is increased, its volume increases in direct proportion, which is yet another prediction of kinetic molecular theory. If the number of gas particles increases at constant pressure and temperature, the particles must occupy more volume. 

FIGURE 11.18 Volumeversus number of moles The volume of a gas sample increases linearly with the number of moles in the sample. 

8-L sample of helium gas contains 0.22 mol of helium. How many additional moles of helium gas must be added to the sample to obtain a volume of 6.4 L Assume constant temperature and pressure. 

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