The OH covalent bond has a very high bond energy of about 463 kJ / mol. The electrostatic bond of the hydrogen bond has an energy between 10 and 40 kJ / mol. Although the hydrogen bond is relatively weak compared to the covalent bonds, it is stronger than the Van der Waals interactions and plays among other things a primordial role in the biological systems and on the physicochemical properties of water. (as heard in the 1st audio) Thus the consequences of the existence of strong hydrogen bonds are remarkable on the temperatures of change of state of water compared to compounds of similar structure. According to the following graph, 2- What are these values for water? What is the temperature range of existence of liquid water at normal pressure (1 atm)? What would these values be if the water molecule were not also polar (Extrapolate by following the dotted lines)? 100 °C 60 boiling point H20 20 -20 H,Se H2S H,Te -60 freezing point -80 40 80 g/mol 160 masse molaire température

The OH covalent bond has a very high bond energy of about 463 kJ / mol. The electrostatic bond of the hydrogen bond has an energy between 10 and 40 kJ / mol. Although the hydrogen bond is relatively weak compared to the covalent bonds, it is stronger than the Van der Waals interactions and plays among other things a primordial role in the biological systems and on the physicochemical properties of water. (as heard in the 1st audio) Thus the consequences of the existence of strong hydrogen bonds are remarkable on the temperatures of change of state of water compared to compounds of similar structure. According to the following graph, 2- What are these values for water? What is the temperature range of existence of liquid water at normal pressure (1 atm)? What would these values be if the water molecule were not also polar (Extrapolate by following the dotted lines)? 100 °C 60 boiling point H20 20 -20 H,Se H2S H,Te -60 freezing point -80 40 80 g/mol 160 masse molaire température

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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