Given the thermodynamic information below for ethylene glycol (molar mass = 62.068 g/mol): Normal melting point: -12.9 °C Normal boiling point: 197.3 °C Enthalpy change of fusion: 9.9 kJ/mol Enthalpy change of vaporization: 65.6 kJ/mol Molar heat capacity for the liquid phase: 149.5 J/mol.K Molar heat capacity for the gas phase: 78 J/mol.K Determine the minimum amount of heat needed to completely vaporize an 18.0-g sample of ethylene glycol initially at 25.0 °C. Consider that all processes occur at 1 atm. Select one: O a. 34.1 kJ O b. 19.0 kJ O c. 7.47 kJ O d. 26.5 kJ

Given the thermodynamic information below for ethylene glycol (molar mass = 62.068 g/mol): Normal melting point: -12.9 °C Normal boiling point: 197.3 °C Enthalpy change of fusion: 9.9 kJ/mol Enthalpy change of vaporization: 65.6 kJ/mol Molar heat capacity for the liquid phase: 149.5 J/mol.K Molar heat capacity for the gas phase: 78 J/mol.K Determine the minimum amount of heat needed to completely vaporize an 18.0-g sample of ethylene glycol initially at 25.0 °C. Consider that all processes occur at 1 atm. Select one: O a. 34.1 kJ O b. 19.0 kJ O c. 7.47 kJ O d. 26.5 kJ

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter9: Liquids And Solids

Section: Chapter Questions

Problem 106E

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