Chemical Energetics Part 2: Hess’s Law Flashcards
1
Q
Define Hess’s Law.
A
The total enthalpy change for converting reactants into products is independent of the route taken.
2
Q
How can Hess’s Law be applied?
A
Allows us to calculate the enthalpy changes of reactions that cannot be measured in the laboratory.
3
Q
Define enthalpy change of solution.
A
This is the enthalpy change when one mole of a substance dissolves in excess water under standard conditions.
4
Q
Define lattice dissociation enthalpy.
A
Ionic solid -> gaseous ions
5
Q
Define hydration enthalpy.
A
Gaseous ions -> aqueous ions
