Question

The standard enthalpies of formation, at 25.00degrees celsius, of methanol (CH4O (l)), water (H2O (l)), and carbon dioxide (CO2 (g)) are respectively -238.7 kJ / mol, - 285.8 kJ / mol, and -393.5 kJ / mol. Calculate the change in the surrounding entropy (in J / K) when burning 15.4 g of methanol under a constant pressure of 1,000 atm at 25.00 degrees celsius (combustion is the reaction of a substance with oxygen molecular to produce water and carbon dioxide).