Two reaction progress variables are needed. These are chosen as:
Other choices of reaction progress variables are possible, but the calculated equilibrium composition would be unaffected. Assuming that the initial gas is pure water vapor, the setup is shown in Table 9.2. From the definitions above and the balancing numbers in the equilibrium reactions, the moles of OH produced are twice those of H2 produced. Substituting the equilibrium mole fractions from the table into Eqs (9.29) yields:
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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.