Thermochemical Databases

The reaction analyses in the previous sections required equilibrium constants K that in turn were determined by the free energy changes AGo. Whether the reaction involves gaseous species, condensed phases, or both, the connection between K and AGo is:

AGo is independent of total pressure because it refers to reactants and products in pure, standard states at 1 atm. However, AGo is a function of temperature, mainly via the relation:

The linear temperature dependence in this equation accounts for the major portion of the variation of reaction free energy change with T. The reaction enthalpy change AHo and the reaction entropy change ASo are much less temperature-sensitive, and in many cases can be taken as constant properties of the reaction (see Sects. 9.2 and 9.3).

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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