NCERT Exercise 5.22 - Chemical Thermodynamics

Question: Find entropy change of surroundings when 1 mol H2O(l) forms under standard conditions, delta_f H degrees = -286 kJ mol^-1.

Answer: delta S_surroundings = +286000/298 = +960 J K^-1 mol^-1 (approximately).

Full step-by-step NCERT solution with diagrams on Something by Zero.