# Gas law constants

Boyles, Charles and Gay Lussac's law each relate to the formula

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

But each one of them has a different constant

Boyles law = T constant (temperature constant)

Charles law = P constant (pressure constant)

Gay Lussac's = V constant (volume constant)

Use the following mnemonic to remember this

Boy That Charles Picks Gay Videos

(remember Gay means happy)

Boy That Charles Picks Gay Videos

translates to

 B T Boyles = Temperature constant C P Charles = Pressure constant G V Gay Lussac = Volume constant

See alternative gas laws mnemonic on the next page.