Hess's Law
- Created by: iloverevision:)
- Created on: 15-05-19 10:15
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- Hess's Law
- What is Hess's Law?
- The total enthalpy change for a reaction is independent on the route taken
- Handy for working out enthalpy changes of reactions that you can not find directly by doing experiments
- Using Enthalpies of Formation
- Useful for calculating enthalpy changes that you can not find directly
- Need to know the standard enthalpy change for all reactants & products
- elements are 0 - element being formed from element so no change in enthalpy
- Standard enthalpy changes are all measured at 298K
- What is Hess's Law?
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