Why temperature is constant in boyles law?

Answer 1

BOYEL'S LAW

At constant temperature, the volume of a fixed amount of gas is inversely proportional to pressure.

The mathematical equation for Boyle's law is:

where:P denotes the pressure of the system.Vdenotes the volume of the gas.

k is a constant value representative of the pressure and volume of the system.

{So long as temperature remains constant the same amount of energy given to the system persists throughout its operation and therefore, theoretically, the value of k will remain constant.} However, due to the derivation of pressure as perpendicular applied force and the probabilistic likelihood of collisions with other particles through collision theory, the application of force to a surface may not be infinitely constant for such values of k, but will have a limit when differentiating such values over a given time.

Forcing the volume V of the fixed quantity of gas to increase, keeping the gas at the initially measured temperature, the pressure p must decrease proportionally. Conversely, reducing the volume of the gas increases the pressure.

Boyle's law is used to predict the result of introducing a change, in volume and pressure only, to the initial state of a fixed quantity of gas. The before and after volumes and pressures of the fixed amount of gas, where the before and after temperatures are the same (heating or cooling will be required to meet this condition), are related by the equation:

Answer 2

In Boyle's Law, the temperature is held constant because the law specifically focuses on the relationship between pressure and volume of a gas at a fixed temperature. By keeping the temperature constant, any changes in pressure and volume can be directly observed and measured without the complicating factor of temperature affecting the results.