Periodic table of elements

Sodium sulfide [Na2S]

SOLUBILITY:
water [H2O]: 12,4 (0), 18,6 (20), 29 (40), 39,1 (60), 49,2 (80)
ethanol [C2H5OH]: ?.?.

PROPERTIES:
colourless cubic crystals
M (molar mass): 78,040 g/mol
MP (melting point): 1180 °C
D (density): 1,86 (20, ?/??3, ?.)
ΔHmelt (molar enthalpy of melting): 6,7 kJ/mol
ΔH°298 (Standard molar enthalpy of reaction at 298 К): -370,3 (?) kJ/mol
ΔG°298 (standard molar Gibbs energy of reaction at 298 К): -354,8 (?) kJ/mol
298 (standard molar entropy at 298 К): 77,4 (?) J/(mol•К)

LITERARY REFERENCES:
• ??????? ???????? ? ??????????????: ?????????? ??? ???????, ????????? ? ??????. - 7-? ???., ?.3. - ?.: ?????, 1976. – P. 54-55
• Seidell A. Solubilities of inorganic and metal organic compounds. - 3ed., vol.1 - New York: D. Van Nostrand Company, 1940. – P. 1294-1296
• ???????? ?.?. ?????? ????? ?????. - ?.2. - ?.: ?????, 1973. – P. 242
• ????????? ?.?., ????? ?.?. ??????? ?????????? ??????????. - ?.: ?????, 1977. – P. 85

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