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Flashcards in Chemistry Definition Deck (9)
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1

Lattice Energy

The lattice energy of an ionic crystal is the heat energy evolved when one mole of crystalline solid is formed from its separate gaseous ions under standard conditions

2

All lattice energy is negative

Heat energy is evolved when the ions form electrovalent bond

2

Standard Enthalpy Change of Solution

Enthalpy change when one mole of a substance dissolved in such a large volume of solvent that addition of more solvent produces no further change under standard conditions.

3

Standard Enthalpy Change of Hydration

Enthalpy change when one mole of the gaseous ions is dissolved in a large quantity of water under standard conditions.

4

Hsol > 0

Insoluble in water

5

Hsol < 0

Soluble in water

6

Rate constant unit for all 1st order of reaction

s-1

7

Rate constant unit for all 2nd order reaction

mol-1 dm3 s-1

8

Rate constant unit for all third order of reactions

mol-2 dm6 s-1