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F325 Past Papers
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Total cards: 3•Content version: v4•Public deck•Updated: 8/1/2026
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#1
Front (Question)
What is lattice enthalpy?
Back (Answer)
(The enthalpy change that accompanies) the formation of one mole of a(n ionic) compound from its gaseous ions (under standard conditions).
#2
Front (Question)
Why is the enthalpy change of hydration exothermic?
Back (Answer)
Hydration involves bond forming.
#3
Front (Question)
The enthalpy change of hydration of magnesium ions is more exothermic than the enthalpy change of hydration of calcium ions. Explain why.
Back (Answer)
Magnesium ion has a greater charge density, so magnesium ions have a stronger attracction to H20.