Define enthalpy change of hydration (ΔH⦵hyd).
Enthalpy change of hydration is the enthalpy change that occurs when one mole of aqueous ions is formed from one mole of gaseous ions.
For example, the equation for the enthalpy change of hydration of Na is:
Na+(g) + aq ➔ Na+(aq).
Answer in your head, out loud, or on paper, then tap the card to flip.
What enthalpy changes do the arrows A-C represent?
ALattice enthalpy.
BEnthalpy of hydration.
CEnthalpy of solution.
Answer in your head, out loud, or on paper, then tap the card to flip.
How can the solubility of a compound in water be predicted from its ΔH⦵sol value?
A compond is likely to be soluble in water only if ΔH⦵sol is negative or has a small positive value.
Answer in your head, out loud, or on paper, then tap the card to flip.
What is the equation that links enthalpy change of solution (ΔHsol), enthalpy change of hydration (ΔHhyd), and lattice enthalpy (ΔHlatt)?
ΔHsol = -ΔHlatt + ΔHhyd
This equation can also be written as ΔHsol = ΔHhyd - ΔHlatt
Answer in your head, out loud, or on paper, then tap the card to flip.