We knew that the concepts of mechanical work and energy play an important role in studying mechanical phenomena. Concerning to thermal phenomena, there exits a new form of energy called “heat”: Heat can be transferred from one to other systems For a system with volume held constant, the effect of heat is to change the temparature of a system. | GENERAL PHYSICS II Electromagnetism Thermal Physics 4 29 2008 1 Chapter XV The First Law of Thermodynamics 1. Heat work and paths of a thermodynamic process 2. The first law of thermodynamics 3. Kinds of thermodynamic processes 4. Thermodynamic processes for an ideal gas 4 29 2008 2 We knew that the concepts of mechanical work and energy play an important role in studying mechanical phenomena. Concerning to thermal phenomena there exits a new form of energy called heat s Heat can be transferred from one to other systems s For a system with volume held constant the effect of heat is to change the temparature of a system. In general cases for a system there exist at the same time transfer or exchange of heat and mechanical work the GOAL of thermodynamics is the study of the relationships involving heat mechanical work the laws that govern energy transfers 4 29 2008
