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Ideal Gas Law and Kinetic Theory

Key Questions

  • Answer:

    The ideal gas law states that #PV=nRT#.


    The ideal gas law gives the relationship between a substance's mass, volume, its current temperature, the amount of moles of the substance, and the pressure it is currently in, by a simple equation.

    In my words, I would say that it says that:

    The product of the pressure and volume of a substance is directly proportional to the product of number of moles and the temperature of the substance.

    For the symbols:

    #P# is the pressure (usually measured in #"kPa"#)

    #V# is the volume (usually measured in #"L"#)

    #n# is the amount of moles

    #R# is the ideal gas constant (usually use #R=8.314* \ "L" \ "kPa" \ "mol"^-1 \ "K"^-1#)

    #T# is the temperature (usually measured in #"K"#)

    Note that no ideal gases are found to exist, but we can still use this equation for real-life gases, as they behave like ideal gas at low pressure and temperatures. But remember that, in real life, no gas will perfectly obey the ideal gas law.