Module 5- Enthalpy Of Hydration And Solubilities

Question 1

Enthalpy of solution

Answer 1

Enthalpy change that occurs when one mole of an ionic solid dissolves in water
Always a +

Question 2

Enthalpy of hydration of an ion

Answer 2

Occurs when 1 more of a gaseous ion is completely hydrated by water under standard conditions

Question 3

Lattice enthalpy

Answer 3

Enthalpy change when one mole of a substance is formed from its constituent ions in gaseous state under standard conditions

Question 4

Under what circumstances will a substance dissolve??

Answer 4

If the energy released during the hydration of an Ion is similar to the energy taken in during
(Lattice enthalpy similar value to hydration enthalpy)

Question 5

How do you connect a born haber cycle to an enthalpy of solution cycle??

Answer 5

The lattice enthalpy (enthalpy when 1mole of a Crystal formed from constituent ions in gaseous state under standard conditions) is common to both cycles, so you just add the cycles together