unit 1

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  • Created by: lucywolfp
  • Created on: 18-02-17 21:22
Define the term first ionisation energy
The energy required to remove 1 mole of electrons from gaseous atoms of an element
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Why could an experimental enthalpy change be significantly different from the data book value?
Not under standard conditions, Heat loss to surroundings, Reaction may be incomplete
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Why can a small amount of UV light result in a large amount of product in free radical substitution?
A chlorine radical is regenerated by the propagation reactions
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Why does the melting temperature increase from sodium to aluminium?
Cations decrease in size, Cations increase in charge, More electrons are contributed to the sea of delocalised electrons, therefore stronger attractions to be broken
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What is the structure and bonding in sodium?
giant lattice, metallic
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What is the structure and bonding in silicon?
giant lattice, covalent
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Why do ionic compounds have relatively high melting temperatures?
There are strong electrostatic forces between cations and electrons, Ions held in giant lattice, requires lots of energy to overcome
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Define a mole
The amount of any substance containing the same number of identical entities as there are in exactly 12g of the carbon- 12 isotope
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Other cards in this set

Card 2

Front

Why could an experimental enthalpy change be significantly different from the data book value?

Back

Not under standard conditions, Heat loss to surroundings, Reaction may be incomplete

Card 3

Front

Why can a small amount of UV light result in a large amount of product in free radical substitution?

Back

Preview of the front of card 3

Card 4

Front

Why does the melting temperature increase from sodium to aluminium?

Back

Preview of the front of card 4

Card 5

Front

What is the structure and bonding in sodium?

Back

Preview of the front of card 5
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