Hess' Law
ΔHtotal = ΔH1 + ΔH2 +ΔH3 ...
Change in enthalpy of a reaction (ΔH) is the same regardless of the pathway used to reach the products. When you click "New Problem" a reaction set with a single missing enthalpy will be displayed. Calculate the needed enthalpy using Hess' law, enter it in the cell and click the "Check Answer" button. Take your time to organize the reactions provided and determine the correct steps for reacting the require products. Sample problems are randomly generated when you press the "New Problem" button. If you are unsatified with any of the problems click the "New Problem" button at any time.
- To begin, click "New Problem" and a question will appear to the right of the button.
- IMPORTANT: Put the correct value into the answer cell and click "Check Answer."
- The results on the problem and a running total will appear in the second table.
- If you miss a problem three (3) times, clicking "Show Answer" will display the complete solution and you will no longer be able submit an answer for that problem. If you click "Show Answer" prior to answering incorrectly three times the answer will NOT be displayed.
The javascripting that powers this practice problem generator was produced by Professor George Wiger of California State University Dominguez Hills.
