Preface to the Two-Volume Series. Preface to the First Volume. Introduction. The First and Second Laws of Thermodynamics. Thermodynamic Relationships and Applications. The Third Law and Absolute Entropy Measurements. The Chemical Potential and Equilibrium. Fugacity, Activity, and Standard States. The Thermodynamic Properties of Solutions. The Equilibrium Condition Applied to Phase Equilibria. The Equilibrium Condition Applied to Chemical Processes. Statistical Thermodynamics. APPENDIX 1: Mathematics for Thermodynamics. APPENDIX 2: The International Temperature Scale of 1990. APPENDIX 3: Equations of States for Gases. APPENDIX 4: Calculations from Statistical Thermodynamics.