# Boyle's Law

### Boyle's law

Boyle's law states that the pressure of a gas with constant mass is inversely proportional to its volume provided the temperature of the gas is kept constant.
$Pα 1 V P= k V PV=k$
Formula:
$P 1 V 1 = P 2 V 2$

#### Explanation

1. When the volume of gas decreases, the number of gas particles per unit volume increases.
2. As a result, the frequency of collision between the air particles and the wall of the container increases.
3. As such, the pressure of the gas increases.

#### Graph

1. In the graphs above, the first graph shows that P is inversely proportional to V.
2. The second graph shows that P is directly proportional to 1/V.
3. The third and the forth graphs shows that PV is always constant for all value of V and P.