Calculate the entropy change when 1.86 g of H2 reacts with O2 according to the reaction 2H2(g) + O2(g) -> 2H2O(l) at 298 K and 1 atm pressure. The stan- dard molar enthalpy of formation of H2O(l) at 298 K is -285.8 kJ/mol. The correspond- ing free energy of formation is -237.2 kJ/mol. Answer in units of J/K.