Avogadro's law relates volume and amount of a gas from "summary" of Chemistry Simplified NCERT Class 11 by Sanjay Sharma
Avogadro's law is a fundamental concept in the study of gases. It states that, under the same conditions of temperature and pressure, equal volumes of gases contain equal numbers of molecules. In simpler terms, this means that the volume of a gas is directly proportional to the amount of gas present. This relationship can be better understood by considering a simple example. If we have two containers, one containing helium gas and the other containing nitrogen gas, and both containers have the same volume, temperature, and pressure, then according to Avogadro's law, the number of helium molecules in the first container will be equal to the number of nitrogen molecules in the second container. This concept is particularly useful when comparing the volumes of different gases. For instance, if we have a certain volume of oxygen gas and an equal volume of hydrogen gas, both at the same temperature and pressure, we can infer that the number of oxygen molecules is equal to the number of hydrogen molecules present. Avogadro's law allows us to make predictions about the behavior of gases based on their volume and amount. It also provides a theoretical basis for understanding the relationship between the microscopic world of molecules and the macroscopic world of gases. In summary, Avogadro's law establishes a direct relationship between the volume and amount of a gas, providing a crucial foundation for the study of gases in chemistry.
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