Extent of reaction concept

The extent of reaction concept can be applied to open systems at steady state in a second way, by considering the rates at which various species are fed to and withdrawn from the system, instead of considering the number of moles fed and withdrawn in a specified interval of time. Let... 

The extent of reaction concept also can be used to calculate the expected amounts of species that are not directly measured. Consider the previous example. Suppose that Reactions (1-C) and (1-D) are, in fact, the only independent reactions that occur in the pilot plant. What quantity of butene (C4H8)... 

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