Gay-Lussac's Law of Combining Volumes (Leaving Cert Chemistry): Flashcards

1778 to 1850

French

When gases react, volumes of reactants and gaseous products are in ratios of small whole numbers

Same temperature and pressure

2:1:2

$2H_2 + O_2 → 2H_2O$

1:1:2

$H_2 + Cl_2 → 2HCl$

2:1:2

$2NO + O_2 → 2NO_2$

Gas syringes

Calculate exact gas amounts needed for reactions