Question

You have a 2.0 Molar solution of an unknown acid, “HX”. Given the (25°C) thermodynamic data below, calculate K_eq given that                                                  K_eq = exp.[-ΔG/RT] and R is the gas constant 8.314 J/mol K

Another useful equation : ΔG = ΔH - TΔS                   

                        HX   —> H+ + X-    all aqueous

Enthapies of formation           Entropy of formation

In KJ/mole                              in J/mole K

HX                  200                                          300

H+                   10                                              0

X-                    250                                          175

Do you have to multiply the enthaply and entropy values by 2 because it is a 2.0 molar solution when calculating delta G and K eq? If you do, would the answer be incorrect ?

Answer 1