Tag: Heat Changes in a Chemical Reaction

Exothermic and Endothermic reactions

Exothermic and Endothermic reactions In chemical reactions bonds are formed and broken. The breaking of bonds requires the absorption of heat, which is the lowest energy applied to reactants before bond breaking occurs. This energy is called activation energy (AE) of the reaction. Formation of the bonds results in the release of energy to the…...

Measuring Enthalpy Change

Measuring Enthalpy Change Apparatus Thermometer to measure initial and final temperature Insulated container(plastic/Styrofoam) to prevent heat loss or gain during reaction Electronic balance(weigh mass of reactant) Measuring cylinders to measure volume of solvent The solute should be properly dissolved and the heat should be evenly distributed throughout the solution as best as possible. Hence a…...