CHAP. 8: CHEMICAL EQUILIBRIUM [CONTENTS] 259
8.6 Simultaneous reactions
If several chemical reactions proceed simultaneously in the initial mixture, we speak about
simultaneous reactions.
8.6.1 Material balance
For simultaneous reactions we may expand the procedure described for a single reaction [see
8.2.2] by introducing as many extents of reaction as is the number of independent reactions
proceeding in the system. Anindependent reactionis a reaction that cannot be obtained
by a linear combination [see5.1.1] of other reactions.
Example
Derive expressions for the equilibrium constants of two isomerization reactions proceeding in an
ideal gas phase. Proceed from 1 mole of a pure substance A 1.