solubility Flashcards
1
Q
is lattice enthalpy always positive or always negative
A
always negative
2
Q
define hydration enthalpy (deltaH hyd)
A
the enthalpy change when one mole of gaseous ions dissolves in water to form an infinitely dilute solution
3
Q
define enthalpy of solution (deltaH soln)
A
the enthalpy change when 1 mole of an ionic solid is dissolved in water to form an infinitely dilute solution.
4
Q
deltaH solution =
A
deltaH hydration - deltaH lattice
5
Q
what causes the lattice enthalpy to be more exothermic
A
increased ionic charge
decreased ionic radius
6
Q
what is lattice enthalpy a measure of
A
the strength of the ionic bond (Moree negative value means stronger ionic bond)
7
Q
is hydration enthalpy always negative or always positive
A
always negative (exothermic process)
