TechDis Accessibility Essentials 3: Creating Accessible Presentations

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TechDis Accessibility Essentials 3 Creating
Accessible Presentations

• This presentation on The Born-Haber Cycle
  highlights how complex content can be displayed
  in a logical user friendly manner. Using
  annotations and animations.
• Navigate through the slides sequentially. The
  Notes section provides textual exemplification of
  the graphical information.

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BORN-HABER CYCLE FOR SODIUM CHLORIDE

• For an ionic compound the lattice enthalpy is the
  heat energy released when one mole of solid in
  its standard state is formed from its ions in the
  gaseous state.
• This value cannot be determined directly and so
  we make use of changes for which data are
  available and link them together with an enthalpy
  cycle.
• This enthalpy cycle is based on the formation of
  the compound from its elements in their standard
  states.

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Atomisation of Sodium
Na(g) 1/2 Cl2(g)
Na(s) 1/2 Cl2(g)
4
Atomisation of Chlorine
Na(g) Cl(g)
Na(g) 1/2 Cl2(g)0
Na(s) 1/2 Cl2(g)
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First Ionisation of Sodium
Na(g) Cl(g)
e-
e-
e-
e-
e-
e-
e-
e-
e-
e-
e-
Na(g) Cl(g)
Na(g) 1/2 Cl2(g)
Na(s) 1/2 Cl2(g)
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First Electron Affinity of Chlorine
Na(g) Cl(g)
Na(g) Cl-(g)
Na(g) Cl(g)
e-
Na(g) 1/2 Cl2(g)
Na(g) 1/2 Cl2(g)
Na(g) 1/2 Cl2(g)
Na(s) 1/2 Cl2(g)
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Formation of Sodium Chloride
Na(g) Cl(g)
Na(g) Cl-(g)
Na(g) Cl(g)
Na(g) 1/2 Cl2(g)
Na(g) 1/2 Cl2(g)
Na(g) 1/2 Cl2(g)
Na(s) 1/2 Cl2(g)
NaCl(s)
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Lattice Enthalpy for Sodium Chloride
Na(g) Cl(g)
Na(g) Cl-(g)
Na(g) Cl(g)
Na(g) 1/2 Cl2(g)
Na(g) 1/2 Cl2(g)
Na(g) 1/2 Cl2(g)
Na(s) 1/2 Cl2(g)
NaCl(s)