Introduction to Entropy and Second Law

  • Cataldo De BlasioEmail author
Part of the Green Energy and Technology book series (GREEN)


The section is centered on the explanation of the entropy concept. The author starts by analyzing the mixing of two gases at the same temperature and pressure, and then, the meaning of what is a function of state is explained in reference to the entropy. The focus of this chapter is on the statistical derivation of the concept of entropy; this is done by means of the particles model. Additional remarks are given on entropy and chemical reactions, and one definition of the second law of thermodynamics is given in reference to the Kelvin–Planck statement. Finally, notions of entropy balances are given.


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Laboratory of Energy Technology, Faculty of Science and EngineeringÅbo Akademi UniversityVaasaFinland

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