Thermodynamics the work of French physicist Nicolas Léonard Sadi Carnot (1824) who believed that engine efficiency was the key that could help France win the Napoleonic Wars. Scots-Irish physicist Lord Kelvin was the first to formulate a concise definition of thermodynamics in 1854 which stated, "Thermo-dynamics is the subject of the relation of heat to forces acting between contiguous parts of bodies, and the relation of heat to electrical agency." The initial application of thermodynamics to mechanical heat engines was extended early on to the study of chemical compounds and chemical reactions. Chemical thermodynamics studies the nature of the role of
19th-century philosophy positivism, Marxism and philological analysis of the Bible. In the second half of the 19th century, an even more orthodox return to Kantian thought was espoused by a number of Neo-Kantian philosophers based in two main locations: the Marburg School and the Baden School. This trend of thought survived into the beginning of the next century, influencing 20th century philosophical movements such as Neopositivism and Phenomenology. One of the most famous opponents of idealism in the first half of the German 19th century was Ludwig Feuerbach, who advocated materialism and atheism. In early 19th century Britain, Jeremy Bentham and John