## November 20, 2011

### 5.18 Gay-lussac's law

5.18 use the relationship between the pressure and Kelvin temperature of a fixed mass of gas at constant volume:
$\frac{p_{1}}{T_{1}} = \frac{p_{2}}{T_{2}}$

p1 = Pressure at the beginning

T1 = Absolute temp at the beginning

p2 = Pressure at the end
T2 = Absolute temp at the end
NB: The units of temperature must be Kelvin, but any unit of pressure can be used
Pressure is directly proportional to absolute temperate (when gas is at a constant volume)
$p\propto T$