In this chapter , it concerned with transformation of energy, and the laws of thermodynamics.The laws called Second Law of Thermodynamics. It cover the differences between two forms of energy, heat and work. In an energy balance, both work and heat are included as a simple addtive term, implying that one unit of heat.
In this chapter , It covers about heat engines , thermodynamics temperature scales, ideal-gas temperature scale : Carnot Equation and entropy changes of an ideal gas.
First we are going to talk about heat engines. Heat engines is a machines that produce work from heat in a cyclic process. An example is a steam power plant in which the working fluid periodacally return to its original state. The formula provided in this subtopics is W= Qh- Qc. and Thermal efficiency=1-Qh/Qc.
For the Carnot Equation the formula is Qh/Th=Qc/Tc. If the process is reversible and adiabatic Qrev=0 then S=0. Thus the entropy of a system is constant during adiabatic process and the process is said to be isentropic