3.1 Heats of Combustion, Neutralization, Reaction and Solution
Energy content of common fuels.
- Wherever possible these terms should be introduced through experiments.
Simple energy level diagrams
3.3 Hess' Law
Experimental justification and simple calculations.
- The relationship of Hess' law to energy level diagram and thermo-chemical cycles should be brought out.
Students should be made aware that delta-H is not the sole driving force in a reaction and that endothermic reactions proceed spontaneously.
- Only delta-H is considered in this section.
For reactions of gases (enthalpy of reaction at constant volume) and delta-H (enthalpy of reaction at constant pressure are not the same but the difference can be ignored. Most laboratory experiments are done at constant pressure and delta-H changes are measured.