Chemistry 2.4 Energetics and enthalpy
- Created by: Dan
- Created on: 22-12-13 18:22
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- Enthalpy (H) = The heat content of a system
- Enthalpy change (Delta H) = The heat added to a system at constant pressure
- The chemical system is the reactants and products. The surroundings are everything other than the system
- In chemical reactions existing bonds are broken and new bonds are made. This changes the chemical energy of atoms.
- Energy is exchanged between the chemical system and the surroundings as heat
- To measure this energy the term enthalpy is used
- The principle of conservation of energy states that energy cannot be created or destroyed, only changed from one form to another
- If heat is released, it is still considered energy
- Enthalpy change = Enthalpy of products - Enthalpy of reactants
- If heat is…
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