3.2: Describe Simple Calorimetry Experiments for Reactions such as Combustion, Displacement, Dissolving and Neutralisation

CALORIMETRY EXPERIMENT: Method to Measure heat transfer

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CALORIMETRY EXPERIMENT FOR COMBUSTION:

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CALORIMETRY EXPERIMENT - COMBUSTION

Diagram showing the Calorimetry Experiment for Combustion

METHOD: Using a measuring cylinder, measure 100 cm3 of Water into a Copper can (copper provides efficient heat insulation) Measure and record the initial temperature of Water Filling the spirit burner with test substance, measure and record its mass Place burner under Copper can and light the wick Constantly stir the Water and continue heating until temperature rises by about 20 - 30°C, then B\blow out the flame Measure and record the highest temperature of Water Measure and record the final mass of burner and remaining Alcohol

CALCULATION: Rise in Temperature of Water    =    Final Temperature - Initial Temperature Mass of Alcohol Burnt     =    Initial mass - Final mass Enthalpy Change:

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CALORIMETRY EXPERIMENT FOR DISPLACEMENT, DISSOLVING AND NEUTRALISATION:

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CALORIMETRY EXPERIMENT - DISPLACEMENT, DISSOLVING AND NEUTRALISATION

Diagram showing Calorimetry Experiment for Displacement, Dissolving and Neutralisation

METHOD: Using a measuring cylinder, measure 25 cm3 of Solution 1 into a Polystyrene cup Measure and record the temperature of Solution 1 Add measured amount of reactant (solid for dissolving, solution 2 for displacement and neutralisation) into the Polystyrene cup and stir the mixture Measure and record the highest temperature reached by mixture

CALCULATION: Rise in Temperature    =    Final Temperature - Initial Temperature Mass of Solution  =  Solution 1 + Solution 2  OR Solution 1 if solid is dissolved Enthalpy Change: *If Water is not used, this is replaced by the mass or volume of other solutions