Calculate the Delta G for a reaction at 30 *C having Delta H = - 220. kJ and delta S =. - 70.0 j / k. Is the reaction spontaneous? a) - 199 kJ , no it is not spontaneous. b) + 199 kJ, yes it is spontaneous c) - 199 kJ, yes it is spontaneous d) - 21,430 kJ, yes it is spontaneous Please explain your answer, thanks.