# K_a (fugacity)

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K_a =
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DavidC.K_a (fugacity)
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For reaction aA + bB harr cC + dD, the Chemical Equilibrium Constant is represented by K_a.   This relationship is built upon the activity of each component i in the reaction.
hata _i = the activity of component i = hatf_i / dotf_i     where:
hatf_i = fugacity of component i     and
dotf_i = fugacity of pure i in its standard state