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Properties of substance:

sodium metaphosphate

Group of substances:

inorganic

Physical appearance:

colorless crystals

Empirical formula (Hill's system for organic substances):

NaO3P

Structural formula as text:

NaPO3

Molar/atomic mass: 101.96

Melting point (°C):

620

Solubility (g/100 g of solvent):

dimethylformamide: 0.05 (25°C) [Ref.]
water: 14.5 (25°C) [Ref.]
water: 32.5 (100°C) [Ref.]

Density:

2.48 (20°C, g/cm3)

Viscosity (mPa·s):

1250 (650°C)
700 (700°C)
440 (750°C)
300 (800°C)
210 (850°C)

Surface tension (mN/m):

191.6 (660°C)
190 (700°C)
186 (800°C)
182 (900°C)
179 (980°C)

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-1220 (s)

Standard molar entropy S0 (298.15 K, J/(mol·K)):

95.5 (s)

Molar heat capacity at constant pressure Cp (298.15 K, J/(mol·K)):

86.6 (s)

Molar enthalpy (heat) of fusion ΔfusH (kJ/mol):

17.3

Standard molar enthalpy (heat) of formation ΔfH0 (298.15 K, kJ/mol):

-1212

References:

  1. Корбридж Д. Фосфор. Основы химии,биохимии, технологии. - М.: Мир, 1982. - pp. 155, 169-170 [Russian]
  2. Рабинович В.А., Хавин З.Я. Краткий химический справочник. - Л.: Химия, 1977. - pp. 85 [Russian]
  3. Справочник химика. - Т. 2. - Л.-М.: Химия, 1964. - pp. 144-145 [Russian]

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    © Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru