The standard free energy for the neutralization of hcl with naoh at 25 degrees c ic 79.9 kj/mol. calculate the equillibrium constant

 According to Gibbs free energy and assume constant pressure (Helmholtz ΔG=ΔGΘ+RTln(K)Where K is the equilibrium constant.
 At equilibrium ΔG=0:

0=ΔGΘ+RTln(K)→ΔGΘ=−RTln(K)

Solve for the equilibrium constant:

−ΔGΘRT=ln(K)[P][S]=K=exp(−ΔGΘRT)
using this equationJust put into the equation and calculate the equilibrium constant K.
hope it helps

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