Review Key points S.J.T.0. Phase Transformation and Applications The first law of thermodynamics is simply the principle of conservation of energy:that is,energy can be neither created or destroyed. To derive the practical benefits of knowing this principle, we must construct an accounting system for energy, sometimes called an energy balance. This system must handle flows of energy,such as heat and work,as well as the various forms of energy that matter possesses. To operate this accounting system,we will need to understand a series of basic notions and definitions. SJTU Thermodynamics of Materials Spring2008©X.J.Jin Lecture 2 First Law llPhase Transformation and Applications S. J. T. U. SJTU Thermodynamics of Materials Spring 2008 © X. J. Jin Lecture 2 First Law II Review / Key points • The first law of thermodynamics is simply the principle of conservation of energy: that is, energy can be neither created or destroyed. • To derive the practical benefits of knowing this principle, we must construct an accounting system for energy, sometimes called an energy balance. • This system must handle flows of energy, such as heat and work, as well as the various forms of energy that matter possesses. • To operate this accounting system, we will need to understand a series of basic notions and definitions