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Unformatted text preview: Hydration of Na+ : Steps 2+3 : Na + Cl (H2O) Na + Cl Delta H solution = Delta H1 + Delta H2 + Delta H3 Delta H1=C.Lattice (+ must be) Delta H2 + Delta H3 = Delta H hydration (- must be) Hydration sphere H2O molecules encapsulating the corner Chlorine ions in salt crystals What factors influence dissolving? All spontaneous changes need a negative delta G Delta G = Delta H T*DeltaS [Rare] H negative, T*delta S positive always have negative delta G at all temperatures [Usually] H positive , S positive non-spontaneous at low temperature, spontaneous at high temperatures Driving force for making solutions : entropy increases...
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- Spring '07