'Second ionisation energy' diaporamas de présentation

Atomic Structure

Relative electric charge. Position in atom. Relative mass. Atomic Structure. Composition of an atom. Atoms are made up of 3 fundamental subatomic particles :. nucleus + 1 1 nucleus 0 1 around the - 1 1 / 1840 nucleus. Protons (p) Neutrons (n) Electrons (e - ).

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Trends In the periodic table

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Thermodynamics

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Born-Haber Cycles

Born-Haber Cycles. ?H bond energy of chlorine. Mg 2+ (g) + 2e - + 2Cl (g). Mg 2+ (g) + 2e - + Cl 2 (g). enthalpy H. ?H second ionisation energy. 2 x ?H first electron affinity. Mg + (g) + e - + Cl 2 (g). Mg 2+ (g) + 2Cl - (g). ?H first ionisation energy.

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Born-Haber cycle for the formation of magnesium chloride.

Mg 2+ (g) +2e - + 2Cl(g). Mg(g) + Cl 2 (g). Mg(g) + 2Cl(g). Mg + (g) +e - +2Cl(g). Mg 2+ (g) + 2Cl - (g). Mg 2+( Cl - ) 2 (s). enthalpy of formation of magnesium chloride. Born-Haber cycle for the formation of magnesium chloride. D H 4 = +1460 kJ.

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