The Second Law S.J.T.0. Phase Transformation and Applications The First Law:the conservation of energy and energy transfer in terms of heat and work. Energy is a state function. The Second Law:ENTROPY. Overview Heat engines,devices that convert thermal energy (heat)into mechanical energy (work). The first law places no limits on the amounts that can be converted. The second law is concerned with limits on the conversion of"heat"into “work”by heat engines. 1824,a French engineer,Sadi Carnot,idealized heat engine. P.W.Atkins,The Second Law,Scientific American Books,1984 SJTU Thermodynamics of Materials Fall 2012 ©X.J.Jin Lecture 3 Second law IPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2012 © X. J. Jin Lecture 3 Second law I The Second Law The First Law: the conservation of energy and energy transfer in terms of heat and work. Energy is a state function. The Second Law: ENTROPY. Overview Heat engines, devices that convert thermal energy (heat) into mechanical energy (work). The first law places no limits on the amounts that can be converted. The second law is concerned with limits on the conversion of “heat” into “work” by heat engines. 1824, a French engineer, Sadi Carnot, idealized heat engine. P. W. Atkins, The Second Law, Scientific American Books, 1984