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 in literature 19th century in literature Literature of the 19th century refers to world literature produced during the 19th century. The range of years is, for the purpose of this article, literature written from (roughly) 1799 to 1900. Many of the developments in literature in this period parallel changes in the visual arts and other aspects of 19th-century culture. Literary realism is the trend, beginning with mid nineteenth-century French literature and extending to late-nineteenth- and early-twentieth-century authors, toward depictions of contemporary life and society as it was, or is. In the spirit of general "realism," realist authors opted for depictions of everyday