1.2 Energy Transfer(1) S.J.T.U. Phase Transformation and Applications Energy transfer between system and surroundings is divided into heat and work Heat:energy transferred between the system and surroundings because of temperature difference Work:all other forms of energy transferred between the system and its surroundings SJTU Thermodynamics of Materials Spring2010©X.J.Jin Lecture 1 First law I 16/38Phase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2010 © X. J. Jin Lecture 1 First law I 16/38 1.2 Energy Transfer (1) • Energy transfer between system and surroundings is divided into heat and work – Heat: energy transferred between the system and surroundings because of temperature difference – Work: all other forms of energy transferred between the system and its surroundings