The standard enthalpy of vaporization of Freon-11,CFCl₃,is 25.21 kJ/mol at its normal boiling point of 17°C.What is the change of entropy for 1 mol of liquid Freon-11 when it vaporizes at its normal boiling point? A)8.69 × 10^-2 J/K B)7.31 × 10³ J/K C)86.9 J/K D)1.48J/K E)1.48× 10³ J/K

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Quizplus · Accepted Answer

The change in entropy for a phase transition can be calculated using the formula ΔS = ΔH/T, where ΔH is the enthalpy change (in joules) and T is the temperature in Kelvin. For Freon-11, ΔH = 25.21 kJ/mol = 25210 J/mol, and the boiling point is 17°C, which is 290.15 K (17 + 273.15). Thus, ΔS = 25210 J/mol / 290.15 K = 86.9 J/K·mol.

The Standard Enthalpy of Vaporization of Freon-11,CFCl3,is 25

The Standard Enthalpy of Vaporization of Freon-11,CFCl₃,is 25