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3
Reviews of Thermodynamics
In this chapter, we have presented some of the basic principles, laws, and
relations of engineering thermodynamics. This includes thermodynamic
properties; energy forms such as heat, work, internal energy, enthalpy, and
Gibbs function; the rst and the second law of thermodynamics; ideal gas
equation of states; and relations of change in enthalpy, entropy, and Gibbs
function. A prior knowledge and a review of these materials are essential for
clear understanding of the principles, analysis, and design of fuel cells that
are presented in the next chapters. For more comprehensive reviews of engi-
neering thermodyna