**Question: **What Is The Formula For Gay-Lussac’s Law?

Gay-Lussac’s Law is a special case of the ideal gas law. This law only applies to ideal gases held at a constant volume allowing only the pressure and temperature to change.

**Answer: **Gay-Lussac’s Law is expressed as:

P_{i}/T_{i} = P_{f}/T_{f}

where

P_{i} = initial pressure

T_{i} = initial absolute temperature

P_{f} = final pressure

T_{f} = final absolute temperature

It is extremely important to remember the temperatures are absolute temperatures measured in Kelvin, **NOT** °C or °F.

**Worked Gay-Lussac’s Law Example Problems**

Guy-Lussac's Gas Law Example

Ideal Gas Law Example Problem - Constant Volume

What Is The Formula For Charles' Law?

What Is The Formula For Boyle's Law?