Ideal Gas Law:A fundamental equation that describes the state of an ideal gas using pressure (P), volume (V), temperature (T), and amount in moles (n): $PV = nRT$.
Boyle’s Law: States that the pressure of a given mass of gas is inversely proportional to its volume at constant temperature: $P \propto \frac{1}{V}$ or $PV = k$.
Charles’s Law: Describes how gases tend to expand when heated; at constant pressure, the volume of a gas is directly proportional to its absolute temperature: $V \propto T$ or $\frac{V}{T} = k$.