23 - 1AP Chemistry Lab Heat of Neutralization, H Brockport...

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1 AP Chemistry Lab Brockport High School NY USA Heat of Neutralization, H Mr Keefer Introduction Most chemical reactions are accompanied by a chance in energy, usually in the form of heat. The energy change of a reaction is called the heat of reaction or enthalpy . The symbol, H, is used to denote the enthalpy change. A chemical change that has heat given off during the reaction is said to be exothermic and H is negative (<0); if heat is absorbed, the reaction is endothermic and H is positive (>0). In this experiment you will measure the heat of neutralization when an acid and a base react to form water. The quantity of heat given off during the exothermic reaction will be estimated using a thermally insulated vessel called a calorimeter. The temperature change of the calorimeter and its contents is measured before and after the reaction. The change in enthalpy, H, is equal to the negative product of the temperature change, T, times the heat capacity (C) of the calorimeter and its contents. Materials
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This note was uploaded on 08/31/2010 for the course SCI 56-1120 taught by Professor Unni during the Spring '09 term at Columbia College.

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