# The gas laws

Three people made physical observations and they created:

Boyle's law (pronounced Boils law)

Charles' law (pronounced as in Prince Charles)

Gay-Lussac's law (pronounced gay-loo-sack)

In order to understand these three laws you have to remember the combined version of them, called the Combined Gas Law.

## Combined Gas Law

You must remember:

`(P_1\ \ V_1)/T_1=(P_2\ \ V_2)/T_2`

Use the folllowing mnemonic to remember these:

**P**otato and **V**egetable on top of **T**able

**P**otato and **V**egetable on top of **T**able

translates to

`(P\ \ V)/T`

or

`(P_1\ \ V_1)/T_1=(P_2\ \ V_2)/T_2`