Lab 8_Heat of Reaction NaOH(aq) and HCl(aq).docx - 3-10...

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© Beyond Labz , all rights reserved 3-10: Heat of Reaction: NaOH(aq) + HCl(aq) Energy is either absorbed or released for all chemical reactions, and we call this energy the enthalpy of reaction ( H rxn ). If the enthalpy of reaction is positive, then we say that the energy was absorbed or that the reaction was endothermic. If the enthalpy of reaction is negative, then we say that energy was released or that the reaction was exothermic . Most chemical reactions are exothermic. In this problem, you will measure the amount of heat released when aqueous solutions of NaOH and HCl are mixed and react to form water and then you will calculate the heat of reaction. NaOH(aq) + HCl(aq) = H 2 O(l) + NaCl(aq) 1. Start Virtual ChemLab, select Thermodynamics, and then select Heat of Reaction: NaOH(aq) + HCl(aq) from the list of assignments. The lab will open in the Calorimetry laboratory.

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