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To find the Δ H v a p usually larger than Δ H f u s i o n Concept Introduction: The heat of fusion is usually quoted on a molar basis and the temperature remains constant until the enthalpy of vaporization.
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When a substance melts, part of the intermolecular forces are overcome. Since liquids are usually just slightly less dense than solids, the majority of intermolecular forces are still "in place." When the liquid evaporates, nearly all the intermolecular forces are overcome. The energy needed to do this is usually much greater than the energy require for melting. Hence, in nearly all cases,
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Question Text | To find the Δ H v a p usually larger than Δ H f u s i o n Concept Introduction: The heat of fusion is usually quoted on a molar basis and the temperature remains constant until the enthalpy of vaporization. |
Topic | All topics |
Subject | Chemistry |
Class | Class 12 |
Answer Type | Text solution:1 |