Rudolf Juilius Emanuel Clausius

Rudolf Juilius Emanuel Clausius
1822-1888
German

Clausius Statement:

1854: Uber eine veranderte Form des zweiten Hauptsatzes der mechanischen Warmetheorin
It is impossible to construct a device that operates in a cycle and produces no other effects than the transfer of heat from a cooler body to a hotter body.

\int \frac{d Q}{T} \leq 0

d S = \frac{d Q}{T}