PROCEDURE: Thoroughly clean out the calorimeter. Fill a cup with 50mL of water. Heat the water at least 15 or 20 degrees higher than the original temperature. Measure 50mL of 1M NaOH and add it to the calorimeter. Add 50mL of 1M HCl to a dry beaker and measure the temperature of the HCl and the NaOH. Empty the calorimeter and replace with new water
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