UNIVERSITY PHYSICS I CHAPTER 15 The Second law of Thermodynamics and Entropy Chapter 15 The second law of thermodynamics The zeroth law of thermodynamics The expression of the fundamental experiment fact The first law of thermodynamics The a statement of conservation of energy for pure thermodynamic system The second law of thermodynamics: Why we need the second law of thermodynamics?1 Chapter 15 The second law of thermodynamics The zeroth law of thermodynamics: The expression of the fundamental experiment fact. The first law of thermodynamics: The a statement of conservation of energy for pure thermodynamic system. The second law of thermodynamics: Why we need the second law of thermodynamics?