**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

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