The pKa value, which is the negative base-10 logarithm of the dissociation constant of an acid, is intricately linked with the thermodynamics of the dissociation reaction. In fact, the negative pKa value can be seen as a clear indication of the standard Gibbs free energy change for the reaction. This relationship between pKa and standard Gibbs free energy change is entirely direct and proportional in nature.Could you provide me with the precise numeric value for the negative pKa of this particular molecule?