# Charle's Law

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Charle's law, one of the gas laws, states that at a constant pressure the volume of a given mass of gas is directly porportional, increases or decreases, to the absolute temperature.

## Formulas that use Charle's Law

 $$\large{ \frac{V_i}{T_i} = \frac{V_f}{T_f} }$$  or  $$\large{ \frac{V_f}{V_i} = \frac{T_f}{T_i} }$$  or  $$\large{ V_i \; T_f = V_f \; T_i }$$

### Where:

$$\large{ T_f }$$ = final temperature

$$\large{ T_i }$$ = initial temperature

$$\large{ V_f }$$ = final volume

$$\large{ V_i }$$ = initial volume