Does pH affect Gibbs free energy?
1 Answer
Apr 21, 2018
Sometimes...
It does if the reaction involves an acid... The Gibbs' free energy is a function of the reaction quotient:
#DeltaG = DeltaG^@ + RTlnQ#
and if
#"HC"_2"H"_3"O"_2(aq) + "H"_2"O"(l) rightleftharpoons "C"_2"H"_3"O"_2^(-)(aq) + "H"_3"O"^(+)(aq)# ,#K_a = 1.8 xx 10^(-5)#
#"NH"_3(aq) + "H"_2"O"(l) rightleftharpoons "NH"_4^(+)(aq) + "OH"^(-)(aq)# ,#K_b = 1.8 xx 10^(-5)#