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Some characteristics of sodium chloride
Formula unit: NaCl
Molar mass: 58,439 769 28 g
Chemical bond: ionic
Standard enthalpy of formation, solid: -411,12 kJ/mol at 25 0C
Standard enthalpy of formation, liquid: -385,92 kJ/mol at 25 0C
Standard enthalpy of formation, gas: -181,42 kJ/mol at 25 0C
Standard enthalpy for the change in solution: +3,87 kJ/mol at 25 0C
Standard enthalpy for change of fusion: 27,95 kJ/mol at 25 0C
Standard molar entropy, solid: 72 J/m.K
Standard molar entropy, liquid: 95,06 J/m.K
Standard molar entropy, gas: 229,79 J/m.K
Lattice energy (enthalpy): 789 kJ/mol
Heat capacity: 50 J/m.K
Triple point: 801 0C and 30 Pa
Critical point: 3 600 0C and 36.106 Pa
Solubility in water at 20 0C: 360,9 g/L
Solubilty product (ksp): 36
Bond strength: -787 kJ/mol
Lattice constant: 5,65 Ã… (564,02 pm)
Aspect (diaphaneity): transparent
Solubility in water at 20 0C: 360,9 g/L
Density: 2,165 g/cm3.
Mohs hardness: 2,5
Knoop hardness: approx. 16
Crystal system: isometric
Class (H-M): m3m (4/m 3 2/m) - Hexoctahedral
Space goup: Fm3m {F4/m 3 2/m}
Unit cell volume: V 179.44 ų (Calculated from Unit Cell)
Crystalline structure: face-centered cubic
Osmotic coefficient: 0,93
Cleavage planes: perfect on {001}
Fracture: conchoidal
Melting point: 801 0C
Boiling point: 1 413 0C
Specific heat capacity: 36,79 J/K.mol
Refractive index: 1,5442
Thermal conductivity: 6,5 W/m.K at 25 0C
Dielectric constant for 102-2.5x1010 Hz: 5,9 at 25 0C
Magnetic susceptibility: -30,3.10-6 cgs
Thermal expansion:
- at 75 K: 19.10-4/K
- at 273 K: 40. 10-4/K
- at 1000 K: 69,5.10-4/K
Reflection loss: 7,5 % for two surfaces at 10 µm
Specific heat: 0,20 cal/(g K) at 273 K
Debye temperature: 321 K
Bandgap: 9 eV
Young's modulus: 39,96 GPa
Rupture modulus: 0,00393 GPa
Shear modulus: 8,97 GPa
Bulk modulus: 24,32 GPa
Poisson ratio: 0,252
NaCl is diamagnetic.
etc.
Wiki User
∙ 8y ago
Wiki User
∙ 10y ago- the chemical formula of sodium chloride is NaCl
- the Mohs hardness is 2,5
- salt is very soluble in water
- salt form face-centered cubic crystals
- the density of salt is 2,17 g/cm3
- the melting point is 801 0C
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