Thermodynamics
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22 Terms
1
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Enthalpy change of formation
The enthalpy change when 1 mole of a compound is formed from its elements in their standard states under standard conditions
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Enthalpy change of dissociation
the nethalpy change when all the bonds of the same type in 1 mole of gaseous molecules are broken
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lattice enthalpy of formation
the enthalpy change when 1 mole of a solid ionic compound is formed from its gasous ions under standard conditions
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lattice enthalpy of dissociation
the enthalpy change when 1 mole of a solid ionic compound is completely dissolved into its gaseous ions under standard conditions
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enthalpy change of 1st ionisation
the enthalpy change when 1 mole of gaseous 1+ ions are formed from gaseous atoms
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enthalpy change of 2nd ionisation
The enthalpy change when 1 mole of gaseous 2+ ions are formed from 1 mole of gaseous 1+ ions
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enthalpy change of atomisation of an element
The enthalpy change when 1 mole of a gaseous atoms is formed from an element in its standard states
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enthalpy change of atomisation of a compound
The enthalpy change when 1 mole of a compound in its standard states is converted to gaseous atoms
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enthalpy change of 1st electron affinity
The enthalpy change when 1 mole of gaseous 1- ions are formed from 1 mole of gaseous atoms
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enthalpy change of 2nd electron affinity
The enthalpy change when 1 mole of gaseous 2- ions are formed from 1 mole of gaseous 1- ions
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enthalpy change of hydration
The enthalpy change when 1 mole of aqueous ions are formed from 1 mole of gaseous ions
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enthalpy change of solution
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The enthalpy change when 1 mole of a solute is dissolved in enough solvent that when there is further dilution, there is no more enthalpy change
The enthalpy change when 1 mole of a solute is dissolved in enough solvent that when there is further dilution, there is no more enthalpy change
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entropy
the measure of disorder
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what does a thing having more entropy mean
it has more disorder
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what state has the least entropy
solid
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what states have the most entropy
liquid and gas
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entropy change calculation
ΔS = Sproducts - Sreactants
ΔS is in JK^-1mol-1
ΔS is in JK^-1mol-1
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what does the gibbs free energy calculation tell
if a reaction is feasible
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gibbs free energy calculation
ΔG (Jmol^-1) = ΔH (Jmol^-1) - TΔS (JK^-1mol^-1)
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what is ΔG when a reaction is feasible
0 or negative
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What may have an effect on feasibility
Temperature
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The temperature at which a reaction becomes just feasible can be calculated.
What is ΔG
What calculation is used
What is ΔG
What calculation is used
ΔG = 0
T = ΔH / ΔS
T = ΔH / ΔS