9. What's the change in entropy that occur when a sample containing 2.00 moles of water is heated from 50°C to 150°C at 1 atm pressure? The molar heat capacities for H2O(1) and H2O(g) are 75.3 J/K-mol and 36.4 J/K-mol respectively, and the enthalpy of vaporization for water is 40.7 kJ/mol at 100°C. (A) 220 J/K (B) 250 J/K (C) 280 J/K (D) 310 J/K