Use Trouton's constant to estimate the enthalpy of vaporization of diethyl ether, which boils at 309 K. A) +85 kJ.mol^-¹ B) +26 kJ.mol^-¹ C) +275 kJ.mol^-¹ D) -85 kJ.mol^-¹ E) +3.6 kJ.mol^-¹

Question

Quizplus · Accepted Answer

Trouton's rule states that the entropy of vaporization is approximately 85 J/mol·K for many liquids. Using this, ΔHvap = 85 J/mol·K * 309 K = 26,265 J/mol = 26 kJ/mol.

Use Trouton's Constant to Estimate the Enthalpy of Vaporization of Diethyl