Calculate the entropy change when 5.58 g of H2 reacts with O2 according to the reaction
2 H2(g) + O2(g) → 2 H2O(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.
dG = dH - TdS
The problem gives you dG and dH and T. Solve for dS.
You will need to start by converting 5.58 g to mols. I assume we are to assume the amount of oxygen is an adequate amount. Post your work if you get stuck.