Dulong, Pierre Louis (1785–1838)
Pierre Dulong was a French chemist and physicist who, with Alexis Thérèse Petit
(1791–1820), discovered Dulong
and Petit's law. This states that the specific
heats of elements are inversely proportional to their atomic weights
(see relative atomic mass)
and is equivalent to the observation that the atomic heats of most elements
is about 26.4 J/K.mol. Dulong also discovered the explosive nitrogen trichloride.