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enthalpy of the reaction
The amount of heat generated or absorbed in a chemical reaction can be studied using a calorimeter. our chemical reaction) is placed in a well-insulated vessel surrounded by water (surroundings). A thermometer is used to measure the heat transferred to or from the system to the surroundings. The heat that the chemical reaction puts out, or takes up, (qrxn) is simply the moles of the limiting reagent, nlimiting reagent times ΔHrxn. qrxn = nlimiting reagent·ΔH