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Thermodynamics Equations
AQA Chem 5 Thermodynamics
4
Chemistry
12th Grade
05/17/2015

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Term
What equation links hydration enthalpy of Mg2+ ions and Cl- ions, lattice enthalpy and enthalpy of solution?
Definition
∆Hsolution = ∆HL + Σ∆Hhyd Mg2+ ions + Σ∆Hhyd Cl– ions
Term
Using lattice enthalpy, enthalpy of solution of MgCl2 and hydration of Cl- ions, what is the equation to find the enthalpy of hydration of Mg2+ ions?
Definition
Σ∆Hhyd Mg2+ ions = ∆Hsolution - ∆HL + Σ∆Hhyd Cl– ions
Term
What is the equation used to calculate standard entropy change?
Definition
∆S = E∆S Products - E∆S reactants
Term
What is the equation to calculate Gibbs free energy?
Definition
∆G = ∆H - T∆S
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