If there are more than two components, an analytical procedure is needed. The basic equipment configuration is the same as Figure 2-1.

The equations used are equilibrium, mass and energy balances, and stoichiometric relations. The mass and energy balances are very similar to those used in the binary case, but the equilibrium equations are usually written in terms of K values. The equilibrium form is

**(2-27)**

where in general

**(2-28)**

Equations (2-27) and (2-28) are written once for each component. In general, the K values depend ...

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