Review S.J.T.U. Phase Transformation and Applications Entropy state function The second law is concerned with limits on the conversion of“heat"into“work”by heat engines. Through a consideration of an idealized heat engine operating between two heat reservoirs, Carnot found that not all the heat removed from a high temperature reservoir is converted into work. Entropy increase for an isolated system SJTU Thermodynamics of Materials Fall 2010 ©X.J.Jin Lecture 4 Second law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Fall 2010 © X. J. Jin Lecture 4 Second law II Review • Entropy / state function • The second law is concerned with limits on the conversion of “heat” into “work” by heat engines. • Through a consideration of an idealized heat engine operating between two heat reservoirs, Carnot found that not all the heat removed from a high temperature reservoir is converted into work. • Entropy increase for an isolated system