A reaction that is always spontaneous has delta H ___ and delta S ___. A. +, + B. -, - C. +, - D. -, + Calculate delta G degree for the reaction given the following information: 2SO_2(g) + O_2(g) 2 rightarrow SO_3(g) delta G_f degree for SO_2(g) = -300.4 kJ/mol delta F_f degree for SO_2(g) = -370.4 kJ/mol A. -70.0 kJ B. 70.0 kJ C.-140.0 kJ D. +140.0 kJ For the following reaction at 25 degree C, delta H degree = +115 kJ and delta S degree = +125 J/K. Calculate delta G degree for the reaction at 25 degree. SBr_4(g) rightarrow S(g) + 2Br_2(l) A. +152 kj B. -56.7 kJ C. +77.8 kJ D. +37.1 kJ Which one of the following statements is not correct? A. When delta H for a reaction is negative, the reaction is never spontaneous. B. When delta G for a reaction is negative, the reaction is spontaneous. C. When delta G for a reaction is positive, the reaction is nonspontaneous. D. When delta G for a reaction is zero, the system is at equilibrium. Calculate the delta G_f degree, at 298 K for PbCl2(s) from the following information. delta G degree rxn for the fraction below is -58.4 kJ at 298 K. PbS(s) + 2HCl(g) rightarrow PbCl2(s) + H2S(g) A. -16.0 kJ/mol B. -47.6 kJ/mol C. -314.1 kJ/mol D. -36.2 kJ/mol