Given the following table of thermodynamic data, complete the following sentence.The vaporization of Ti is ________.

Question

Given the following table of thermodynamic data,  complete the following sentence.The vaporization of Ti  is ________.

Quizplus · Accepted Answer

The table shows that the standard entropy change for vaporization of Ti is positive (ΔS°vap = 421 J/K/mol), indicating that the disorder of the system increases upon vaporization. Therefore, the spontaneous vaporization of Ti depends on the temperature and is determined by the balance between enthalpy and entropy changes. At low temperatures, the positive enthalpy change (ΔH°vap = 563 kJ/mol) dominates over the positive entropy change, resulting in a nonspontaneous process. At high temperatures, the positive entropy change dominates over the positive enthalpy change, resulting in a spontaneous process. Therefore, choice C is the best answer.

Given the Following Table of Thermodynamic Data, Complete the Following