Tuesday, 27 January 2015

Mechanical Theory Of Heat

Theory of Heat

The theory of heat or mechanical theory of heat is a theory, introduced by Sir Benjamin Thompson in 1798, and further developed in 1824 by French physicist Sadi Carnot, heat and mechanical work are equivalent. Relates to the mechanical equivalent of heat. Over the next century, with the preface of the second law of thermodynamics by Rudolf Clausius in 1850, this theory became the science of thermodynamics. In 1851, in his work "On the dynamical theory of heat," William Thomson outlined the vision, as based on recent experiments of those like James Joule, that "heat is not a substance but a dynamic effect mechanical, we recognize that there must be an correspondence between mechanical work and heat, as between cause and effect. "

In the following years, the phrase "dynamic theory of heat" gradually became the new science of thermodynamics. In 1876, for example, the American civil engineer Richard Sears McCulloh, stated that "the mechanical theory of heat, sometimes called thermodynamics, is the branch of science that deals phenomena of heat, motion effects and position. "

The term "heat theory", is associated with movement or vibratory energy is generally used in contrast to the caloric theory, considering the heat as a fluid or gas weight able to move in and out of the pores in solid and found between atoms. However, both are really compatible view angles under the principle of conservation of energy and the corresponding first law of thermodynamics.