Properties of salt

Answer 1

Salt is white and really small and it dissolves really fast in mostly hot water.Salt is made of crystals.It exists in solid state and always are ionic compounds and are electrolytes in a queous solution or in molten slate.

Answer 2

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

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

Bond strength: -787 kJ/mol

Lattice constant: 5,65 Ã… (564,02 pm)

Aspect: 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

Cleavage planes: perect 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

etc.