Data & Calculations

Raw Data

Table 1: Independent variables, Raw Data

Table 2: Independent variables, Processed Data

Table 3: Lattice enthalpies, Processed data

Table 2: Electronegativity difference for NaCl

anion - cation = electronegativity difference 3.2 - 0.9 = 2.3

Table 2: Ionic radii sum for NaCl

cation + anion = radii sum 1.02 + 1.81 = 2.83 Å

Table 2: Ionic radii difference for NaCl

anion - cation = radii difference 1.81 - 1.02 = 0.79 Å

Table 2: Radius Ratio for NaCl

cation / anion = radius ratio 1.02Å / 1.81Å = 0.56

Table 3: Average Value of Born-Haber lattice enthalpies of NaCl

(IB Data Booklet + Wired Chemist + Naukowiec) / 3 = average value (790 + 769 + 774) / 3 = 778 kJ/mol

Table 3: Percent difference of NaCl

(experimental - theoretical ) / experimental x 100 = percent difference ((778 - 750.5) / 778) x 100 = 3.53%

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