Factors Effecting the Equilibrium Conversion

As indicated by Eq. 15.3.1, for exothermic reactions - AH° negative - an increase in temperature leads to a decrease in K and, consequently, in Ky or This, in turn, leads to a decrease in equilibrium conversion, as demonstrated in Example 15.6. The reverse is the case for endothermic reactions. 

While K is not a function of pressure, equilibrium conversions are effected by the latter. 

Thus if V 0, an increase in pressure increases Ky and, consequently, the equilibrium conversion. The reverse is true for v 0, while for v = 0 pressure has no effect. A change in pressure effects K, of course, but to a much smaller degree. 

For liquid-phase reactions pressure effects Ky and Kj, Eq. 15.5.2, but to a negligible degree, unless very high pressures are involved. 

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