Avogadros Law Volume and Amount in Moles

When the amount of gas in a sample increases at constant temperature and pressure, its volume increases in direct proportion because the greater number of gas particles fill more space. 

A FIGURE S.12 UDiume versus Number of Moles The volume of a gas sample increases linearly with the number of moles of gas in the sample. 

Avogadro s law assumes constant temperature and constant pressure and is independent of the nature of the gas. 

You experience Avogadro s law when you inflate a balloon. With each exhaled breath, you add more gas particles to the inside of the balloon, increasing its volume. We can use Avogadro s law to calculate the volume of a gas following a change in the amount 

A male athlete in a kinesiology research study has a lung volume of 6.15 L during a deep inhalation. At this volume, his lungs contain 0.254 moles of air. During exhalation, his lung volume decreases to 2.55 L. How many moles of gas did the athlete exhale Assume constant temperature and pressure. 

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