At constant temperature, volume of a given mass of a gas is inversely proportional to the pressure applied on it.
Mathematically,
![](https://mashalscienceacademy.com/wp-content/uploads/2022/01/c11ch4eq2.png)
(At constant temperature)
This means that for constant temperature, the product of pressure and volume of a gas always remains constant.
If temperature is kept constant and a graph is drawn between pressure and volume at different values respectively, the graph is a curve.
![](https://mashalscienceacademy.com/wp-content/uploads/2022/01/Boyle-law-300x169.png)
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