Sunday, March 23, 2008

Hess's Law
Hess' Law is a law of physical chemistry named for Germain Hess's expansion of the Hess Cycle and used to predict the enthalpy change and conservation of energy (denoted as state function ΔH) regardless of the path through which it is to be determined.

Use
Typical table for making a Hess cycle:
Using this ΔHf

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