Germain Henri Hess

Germain Henri Hess
Portrait, c.1850
Born(1802-08-07)7 August 1802
Died12 December 1850(1850-12-12) (aged 48)
Alma materUniversity of Dorpat
Known forHess' law, Thermochemistry
Scientific career
FieldsChemistry
InstitutionsSt. Petersburg Academy of Sciences

Germain Henri Hess (Russian: Герман Иванович Гесс, romanized: German Ivanovich Gess; 7 August 1802 – 12 December [O.S. 30 November]  1850) was a Swiss-Russian chemist and doctor who formulated Hess' law, an early principle of thermochemistry.