Enthalpys Flashcards
What is enthalpy of formation
Energy chage when forming one mole a substance using its element constituants
E.g C + O2 –> CO2
What are the standard conditions
298K (25C)
100KPa
1 mol/dm3
What is Hess Law
using enthalpy of formations to find enthalpy of reaction
If using combustion which way to arrows do in Hess law
DOWN to HELLLLL (Fire)
Definition of enthalpy of neutralisation
Energy change when an acid and base react forming one mole of H2O
When should you round an answer
ONLY AT THE END OF THE QUESTION
When doing bond enthalpy how do u do the final calc
React - Produc
Limitations of bond enthalpys
Its the average of the bond in different chemical enviroments not that specific bond so not exact
Definition of enthalpy of combustion
Energy needed to completely react one mole of something with O2
How to convert C to K
+273 on
Unit for Enthalpys?
KJ/Mol