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The Ideal Gas Law is one of the Equations of State. Although the law describes the behavior of an ideal gas, the equation is applicable to real gases under many conditions, so it is a useful equation to learn to use. The Ideal Gas Law may be expressed as: PV = NkT.
An introduction to Charles' Law, including an explanation of its relation to microwaving Ivory soap and making popcorn.Charles' Law is the second of the gas laws. The first one is Boyle's Law, which gives the relationship between volume and pressure.