According to Gay-Lussac's law, what is considered a constant?

Gay-Lussac's law states that the pressure of a fixed amount of gas is directly proportional to its absolute temperature when the volume is held constant. This means that if the temperature of a gas increases, the pressure also increases, provided that the volume does not change. In this context, temperature is the variable that is directly related to pressure.

In this scenario, the volume of the gas is the parameter kept constant, making it essential to recognize that temperature is the main variable that influences pressure within the confines of Gay-Lussac's law. Thus, while the pressure and temperature are directly linked, volume remains steady throughout the process.

Understanding this relationship is key to applying Gay-Lussac's law effectively in practical settings involving gases, such as in various engineering or millwright applications.