The gas cylinder in the sketch, fitted with a movable piston, is used in an experiment to study the variation of volume with pressure of a gas, while keeping the temperature and quantity of gas constant. (a) How will you keep the quantity of gas and the temperature constant? (b) Briefly explain how you will change the pressure and measure the corresponding volume experimentally. Note: The mass of the piston is known, and you also have a number of coins of known masses at your disposal.

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Ideal Gas Law

Ideal gas law states that the product of pressure and volume of a gas directly varies with the product of the number of moles, the universal gas constant, and the temperature of the gas.