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Chemistry > 5.2.1 > Flashcards

5.2.1 Flashcards

1
Q

What cycle is used to calculate lattice enthalpy?

A

Born-haber cycle

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2
Q

What is lattice enthalpy?

A

when 1 mole of ionic lattice is formed from it’s constituent gaseous ions

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3
Q

What factors affect lattice enthalpy?

A

ionic radius
ionic charge

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4
Q

What does a downwards and upwards arrow mean in a born-haber cycle?

A

upwards mean endothermic
downwards means exothermic

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5
Q

What is the enthalpy change of formation?

A

energy needed to produce
1 mole of a compound
from its elements
in their standard states

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6
Q

What is the enthalpy change of atomisation?

A

energy needed to produce
1 mole of a gaseous atom
from its elements
in its standard states

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7
Q

What is the bond enthalpy?

A

one mole of a covalent bond broken into separate atoms in the gaseous state

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8
Q

What s the 1st ionisation energy?

A

energy needed to produce
1 mole of gaseous 1+ ions
formed from gaseous atoms

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9
Q

What is the 2nd ionisation energy

A

one mole of gaseous 2+ ions formed
from gaseous 1+ ions

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10
Q

What is the first electron affinity?

A

one mole of gaseous 1- ions formed from gaseous atoms

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11
Q

What is the 2nd electron affinity?

A

1 mole of gaseous 2- ions
formed from gaseous 1- ions

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12
Q

What is lattice enthalpy?

A

one mole of ionic lattice formed
from gaseous ions

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13
Q

Is the enthalpy change of formation endothermic or exothermic?

A

Exothermic

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14
Q

Is the enthalpy change of atomisation endothermic or exothermic?

A

endothermic

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15
Q

Is the bond enthalpy endothermic or exothermic?

A

endothermic

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16
Q

Is the 1st ionisation energy endothermic or exothermic?

A

endothermic

17
Q

Is the 2nd ionisation energy endothermic or exothermic?

A

endothermic

18
Q

Is the 1st electron affinity endothermic or exothermic?

A

exothermic

19
Q

Is the 2nd electron affinity endothermic or exothermic?

A

endothermic

20
Q

Is the lattice enthalpy endothermic or exothermic?

A

exothermic

21
Q

What is the standard enthalpy change of hydration?

A

when 1 mole of gaseous ions is hydrated to form 1 mole of gaseous ions

22
Q

What is the standard enthalpy change of solution?

A

enthalpy change when 1 mole of a solute dissolves in a solvent

23
Q

Is enthalpy change of solution endothermic or exothermic?

A

exothermic or endothermic

24
Q

Is enthalpy change of hydration endothermic or exothermic?

A

exothermic

25
Q

Is enthalpy change of lattice enthalpy exothermic or endothermic?

A

exothermic

26
Q

What factors affect enthalpy of solution?

A

ionic size
ionic charge

27
Q

How does the ionic size affect the enthalpy of solution?

A

smaller ions attract each other more and water more

28
Q

How does ionic charge affect the enthalpy of solution?

A

the greater the charge the greater the attraction between postive and negative ions and water

Chemistry (15 decks)

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