Unit 2.6 – Gay Lussac Law 

Gay-Lussac actually performed experiments relating Temperature and Volume but because Charles was more clear in his observations, the law of Temperature and Volume was accredited to Charles. In Gay-Lussac’s law, this is relating temperature and pressure in a directly proportional relationship with the volume being constant.

In terms of the Kinetic Molecular Model, as temperature is increased, the movement of the molecules increase, causing more force on each other, ultimately increasing the pressure when the volume is kept constant.

What does the equation mean?

The Equation is:


There is a direct relationship between Pressure and Temperature. As temperature increases, so does pressure and vice versa.

Example Problem:

10.0 L of a gas is found to exert 97.0 kPa at 25.0°C. What would be the required temperature (in Celsius) to change the pressure to standard pressure keeping a constant volume?




Here’s a great website from Nasa on Boyle’s Law https://www.grc.nasa.gov/www/K-12/airplane/boyle.html

Phet’s awesome simulation of gas laws

Gas Properties