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Charles's Law The pressure that a gas exerts on the walls of its container is determined by the momentum of the atoms and the molecules of the gas, which in turn is determined by temperature. As the temperature increases the atoms and molecules move faster, and so exert a greater pressure on the walls. If the walls are rigid, such that the volume of the container is held constant, the relationship between pressure P and temperature T is given by P = constant x T. However, if the walls are flexible, as the temperature increases the volume increases to maintain even pressure. This is called Charles's Law. Charles law states that the volume of a given amount of dry ideal gas is directly propotional to the Kelvin Temperature, provided the amount of gas and the pressure remains fixed. i.e. V=constant ( t + 273.15) Where t is the gas temperature on Celsius scale....

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