Hess' Law

This page is an exercise in using Hess' Law. When you press "New Problem" a reaction set with a single missing enthalpy will be displayed. Calculate the needed enthalpy, enter it in the cell and press the "Check Answer" button. The results will appear in the table on the main page. This page is complex, but it's not intended to be tricky. Thus, no attempt has been made to mislead you. There should be a straightforward combination of the contributing reactions which yields the desired reaction.

Enter your answer

Results Total Correct