Gibbs Equation for an Ideal Gas
This chapter and succeeding chapters (namely Chaps. 10, 11, 12, 13 and 14) are essentially appendices buttressing the developments in the main text. They are intended to provide further mathematical and numerical support for those readers with a desire for a more rigorous approach. Consider a system, which is closed to the flow of matter or charge through its bounding surfaces, but is in mechanical and thermal contact with its surroundings (in principle the universe). External conditions ensure that the system is at constant pressure and temperature.