Benoît Paul Émile Clapeyron

Émile Clapeyron ( Benoît Paul Émile Clapeyron ) ( born January 26, 1799 in Paris, † January 28, 1864 ) was a French physicist.

He was educated at the École Polytechnique and the Ecole des Mines. After that he went with Gabriel Lamé to Saint Petersburg, where until 1830 he worked in 1820 as a math teacher and as an engineer. After returning to France, he worked as a civil engineer ( among other things, the construction of the first French railway in 1835 from Paris to St. Germain ) and in 1844 professor of mechanical engineering and mechanics at the École des Ponts et Chaussées in Paris.

Clapeyron developed in his work Mémoire sur la puissance de la chaleur motrice (1834 ) is a graphical representation of the thermodynamic cycles of Sadi Carnot. It was the work of Carnot, a mathematical form, the equation of state for ideal gases in the present-day form dates from him. The introduced by him Clausius -Clapeyron equation for the evaporation phase transition in liquids was extended in 1850 by Rudolf Clausius. In the structural analysis, an equation of beam theory is named after him, the so-called three- moment equation at continuous beam of 1857.

In March 1858 he became a member of the Académie des Sciences.

Publications

• Treatise on the motive power of heat ( = Ostwald classics of the exact sciences. No. 216). Akademische Verlagsgesellschaft, Leipzig 1926