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  • Created by: firdowsa
  • Created on: 30-03-14 10:24

The standard enthalpy change of reaction, Δr:

 Is the enthalpy change of a reaction for the number of moles of each substance in the chemical equation, under standard conditions in their standard states.

The standard enthalpy change of formation, Δf:

Is the enthalpy change when one mole of a compound is formed from its elements,in their standard states under standard conditions.

The standard enthalpy change


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