Sodium carbonate can be made by heating sodium bicarbonate: 2NaHCO_3(s) rightarrow Na_2CO_3(s) + CO_2(g) + H_2O(g) Given that Delta H degree = 128.9 kJ/mol and Delta G = 33.1 kj/mol at 25 degree C, above what minimum temperature will the reaction become spontaneous under standard state conditions? A) 0.4 K B) 3.9 K C) 321 K D) 401 K E) 525 K For the following reaction at equilibrium, what effect (shift) would heat do to the formation of products? 2NOBr(g) 2NO(g), Delta HP_rxn = 30 kJ/mol For the following reaction at equilibrium, what effect (shift) would an increase in pressure have on the formation of products? 2SO_2 (g) + O_2 (g) 2SO_3(g) Write the mass-expression, Q_c, for the following chemical reaction. Sn^2+(aq) + 1/2 O_2(g) + 3 H_2 (l) SnO_2(s) + 2H_3O^+ (aq)