Rudolf ClausiusBorn 2 Jan 1822; died 24 Aug 1888 at age 66. who was one of the founders of thermodynamics. In 1850, he stated the second law of thermodynamics. As a theoretical physicist, he also researched in molecular physics and electricity. In his published work in thermodynamics (1865) he gave the First and Second laws of thermodynamics in the following form: (1) The energy of the universe is constant. (2) The entropy of the universe tends to a maximum. In all Clausius wrote eight important papers on the topic. He restated Sadi Carnot's principle of the efficiency of heat engines. The Clausius-Clapeyron equation expresses the relation between the pressure and temperature at which two phases of a substance are in equilibrium. |
