Match each vocabulary word with its definition. match the items in the left column to the items in the right column. 1. the amount of heat released or absorbed by a reaction heat of reaction 2. the change in enthalpy (heat content) that occurs in the process of converting reactants to products in a chemical reaction specific heat 3. a reaction which absorbs heat from the surrounding space exothermic reaction 4. a reaction which gives up heat to the surrounding space endothermic reaction 5. the amount of heat required to raise the temperature of one gram of a given substance by one degree celsius enthalpy of reaction