15. Calculate AGrxn at 298 Kunder the conditions shown below for the following reaction (R = 8.314 J/(K.mol)) SO2(g) + H2O(g) + H2SO4(1) AG= -90.5 kJ P(SO3 = 0.20 atm, P(H2O) = 0.88 atm * (3 Points) +51.4 kJ -30.4 kJ -90.5 kJ -86.2 kJ 16. What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M CH3CO,H with 25.00 mL of 0.050 M CH3CO Na? Ka = 1.8 x 10-5 for CH2CO2H. * (3 Points) 5.05 2.87 4.74 4.44