Energetics 2 topic 13
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8 Terms
The standard elastic energy
Energy change when 1 mole if an ionic solid is formed from gaseous ions under standard conditiosn
Atomisation
When 1 mole of gaseous stomach is formed from the element in its standard state
Electron affinity
The energy changed when 1 mole if ellectrons are added to 1 mole of neutral gaseous atom to form 1 mole of gaseous 1- ions
Electronegativity
The ability of an atom to attract an electron in a covalent bond
Stability and Disorder
Substances are more energetically stable when theres more disorder
Even when reaction is endothermic
Eg NaHCO3 + H+ → Na+ + CO2 + H2O
More disorder in products
Total Entopy
System entropy + surrounding entropy
Free Energy
G = Enthalphy - Temeprature X system entropy
Only valid when G is 0 or negative