When the temperature of a sample of gas in a container with a movable piston is increased from 300 to 500 kk while the pressure is kept constant, the piston will move up to increase the volume of the gas.
Charles's law states that the volume of a given mass of gas is directly proportional to the temperature of the gas provided the pressure of the gas is kept constant.
This law explains that if the temperature of a gas at constant pressure is reduced, the volume of the gas will decrease. Also, if the temperature of a gas at constant pressure is increased, the volume of the gas will increase.
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