Use the data given here to calculate the values of Grxn at 25C for the reaction described by the equation A+BC Grxn= If Hrxn and Srxn are both positive values, what drives the spontaneous (favored) reaction and in what direction at standard conditions? The spontaneous (favored) reaction is enthalpy-driven to the right. entropy-driven to the right. entropy-driven to the left. enthalpy-driven to the left