3. ΔG° for the precipitation of lead(II) iodide, Pb2+(aq) + 2I- (aq) ⇋ PbI2(s), is − 46.2 kJ/mol. Upon mixing of 100 mL of 0.10 M lead(II) nitrate solution with 100 mL of 0.10 M sodium iodide solution, which answer is closest to the ΔG of this precipitation reaction at 25°C? (A) − 24 kJ/mol (B) − 29 kJ/mol (C) − 31 kJ/mol (D) − 68 kJ/mol (E) − 73 kJ/mol