Which of the statements correctly describes the relationship between pressure (P) and volume (V) illustrated in the plot for a gas at constant temperature? a. The pressure of a fixed amount of gas is inversely proportional to its volume.
b. The pressure of a fixed amount of gas is directly proportional to the inverse of its volume.
c. The pressure of a fixed amount of gas is directly proportional to its volume.

a. The pressure of a fixed amount of gas is inversely proportional to its volume.

Explanation:

At constant temperature, the relationship between pressure (P) and volume (V) illustrated in the plot for a gas gives a straight line from the origin.

This relationship was described by a law stated by Robert Boyle, an English Chemist, in 1662.

Boyle's law states that the pressure of a fixed mass of gas is inversely proportional to the volume, provided the temperature remains constant.

The relationship for Boyle’s Law can be expressed mathematically as follows:

P1V1 = P2V2; where P1 and V1 are the values of the initial pressure and volume, and P2 and V2 are the final values of the pressure and volume of the gas.

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