Interpretation: The reason for the high heat of vaporization for water is to be found.
Concept Introduction : Molar heat of vaporization is the amount of energy required to transform a given quantity of a substance from liquid to gas.
Answer to Problem 34LC
Water molecules are strongly attracted to one another because of the strong hydrogen bond, requiring more energy to move from a liquid to a gaseous form.
Explanation of Solution
Water molecules have a partial negative charge on oxygen atoms due to high electronegativity and a partial positive charge on hydrogen atoms due to low electronegativity. These positive and negative regions are attracted to nearby molecules and result in a hydrogen bond. Each water molecule is hydrogen-bonded to four others. Thus, a large amount of energy is required to convert liquid, to water vapor.
Chapter 17 Solutions
Chemistry 2012 Student Edition (hard Cover) Grade 11
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