Enthalpies Of Solution Flashcards
1
Q
Why does water form bonds with the ions?
A
Because it is a polar molecule
2
Q
Why does a dipole form in water?
A
O2 is more electronegative than H - draws bonding e- towards itself = dipole
3
Q
What is the triangle for calculating the enthalpy change of solution?
A
Solid ionic lattice –> gaseous ions –> aqueous ions
Solid ionic lattice –> aqueous ions
4
Q
How do you find the enthalpy of solution?
A
Lattice dissociation + hydration
5
Q
How do you find the enthalpy change of a reaction?
A
Enthalpy change = total energy absorbed - total energy released
6
Q
What two things happen when a solid ionic lattice dissolves in water?
A
Bonds between the ions break - endo = lattice dissociation
Bonds between ions and water are made -exo = hydration
