Why do we have winter heating? S.J.T.U. Phase Transformation and Applications The layman will answer:"to make the room warmer.” The student of thermodynamics will perhaps so express it:"To import the lacking (inner,thermal)energy." If so,then the layman's answer is right, the scientist's wrong. Why? SJTU Thermodynamics of Materials Spring2006©X.J.Jin IntroductionPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2006 © X. J. Jin Introduction Why do we have winter heating? The layman will answer: “to make the room warmer.” The student of thermodynamics will perhaps so express it: “To import the lacking (inner, thermal) energy.” If so, then the layman’s answer is right, the scientist’s wrong. Why?