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Thermochemical Calculations. CA Standards. Units for Measuring Heat. The Joule is the SI system unit for measuring heat:. The calorie is the heat required to raise the temperature of 1 gram of water by 1 Celsius degree. Specific Heat.

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## Thermochemical Calculations

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**Units for Measuring Heat**The Joule is the SI system unit for measuring heat: The calorie is the heat required to raise the temperature of 1 gram of water by 1 Celsius degree**Specific Heat**The amount of heat required to raise the temperature of one gram of substance by one degree Celsius.**Calculations Involving Specific Heat**OR cp = Specific Heat Q= Heat lost or gained T = Temperature change m = Mass**The amount of heat required to raise the temperature of one**gram of substance by one degree Celsius. Specific Heat**Latent Heat of Phase Change**The energy that must be absorbed in order to convert one mole of solid to liquid at its melting point. Molar Heat of Fusion Molar Heat of Solidification The energy that must be removed in order to convert one mole of liquid to solid at its freezing point.**Latent Heat of Phase Change #2**The energy that must be absorbed in order to convert one mole of liquid to gas at its boiling point. Molar Heat of Vaporization Molar Heat of Condensation The energy that must be removed in order to convert one mole of gas to liquid at its condensation point.**Latent Heat – Sample Problem**Problem: The molar heat of fusion of water is 6.009 kJ/mol. How much energy is needed to convert 60 grams of ice at 0C to liquid water at 0C? Mass of ice Molar Mass of water Heat of fusion**Heat of Solution**TheHeat of Solutionis the amount of heat energy absorbed (endothermic) or released (exothermic) when a specific amount of solute dissolves in a solvent.

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