General Chemistry CHEM 101 (3+1+0).

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Presentation transcript:

General Chemistry CHEM 101 (3+1+0)

Chapter 6 تابع الفصل -6 Thermochemistry

Some types of Endothermic and exothermic physical changes and chemical reactions (Enthalpy of fusion, vaporization)

Clausius-Clapeyron Equation Molar heat of vaporization (DHvap) is the energy required to vaporize 1 mole of a liquid at its boiling point. ln P = - DHvap RT + C Clausius-Clapeyron Equation P = (equilibrium) vapor pressure T = temperature (K) R = gas constant (8.314 J/K•mol) Vapor Pressure Versus Temperature

Molar heat of fusion (DHfus) is the energy required to melt 1 mole of a solid substance at its freezing point.

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