2.4 Chapter 7 Thermochemistry (inked 2)

2.4 Chapter 7 Thermochemistry (inked 2) - Determination of...

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1 Determination of Specific Heat Determination of Specific Heat 7-3 Heats of Reaction and Calorimetry • Chemical energy. – Contributes to the internal energy of a system. Associated with chemical bonds and intermolecular interactions. • Heat of reaction, q rxn . – The quantity of heat exchanged between a system and its surroundings when a chemical reaction occurs within the system, at constant temperature. • Exothermic reactions. – Produces heat, q rxn < 0. • Endothermic reactions. – Consumes heat, q rxn > 0. • Calorimeter – A device for measuring quantities of heat Heats of Reaction Bomb Calorimeter q rxn = -q cal q cal = q bomb + q water + q wires +… Define the heat capacity of the calorimeter : q cal = Σ m i c i Δ T=C Δ T al i heat Bomb Calorimeter q rxn = -q cal q cal = q bomb + q water + q wires +… Define the heat capacity of the calorimeter : q cal = Σ m i c i Δ T=C Δ T al i heat
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2 Coffee Cup Calorimeter • A simple calorimeter. – Well insulated and therefore
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This note was uploaded on 04/04/2011 for the course SCIENCE CHEM 120 taught by Professor Fenster during the Winter '11 term at McGill.

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2.4 Chapter 7 Thermochemistry (inked 2) - Determination of...

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