Use the data given here to calculate the values of Delta G_rxn degree at 25 degree C for the reaction described by the equation A + B C Delta G_rxn degree = If Delta H_rxn degree and Delta S_rxn degree are both positive values, what drives the spontaneous reaction and in what direction at standard conditions? The spontaneous reaction is enthalpy-driven to the left. entropy-driven to the left. entropy-driven to the right. enthalpy-driven to the right.