PPT Slide
(b) Heat is on the left (reactant), so _H >0 and the reaction is endothermic.
- Certain enthalpy changes represent such common processes that they are given specific names:
- One mole of a substance combines with oxygen in a combustion reaction; the heat of reaction is the heat of combustion (_H comb ):
- When one mole of compound forms from its elements, the heat of reaction is the heat of formation (_H f ):