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An animation demonstrating the relationship between volume and temperature. Charles's law (also known as the law of volumes) is an experimental gas law which describes how gases tend to expand when heated. A modern statement of Charles's law is.
The Ideal Gas Law can easily be reduced to Charlesâ, Boyleâs, or Avogadroâs Law. For example, suppose that n and T are held constant. Then the product nRT is also a constant and we can give it the name, k. The Ideal Gas Law then becomes PV=k, which is just Boyleâs Law. The symbol âRâ in this equation is a constant called âthe gas constantâ and its value can be computed by measuring the temperature, volume, and pressure of a known quantity of an ideal gas and substituting these values into the Ideal Gas Law solved for R. In fact, this is the bases of the laboratory exercise for this lesson.