- 作者: 潘貫
- 作者服務機構: Contribution from the Department of Chemistry, National Taiwan University
- 中文摘要:
(1) The solubility-product of silver molybdate was determined by the e.m.f. measurements of the cell,
Ag;Ag2MoO4(s)∣Na2MoO4(x)m∥KNO3(m)∥AgNO3(3x)m ∣Ag2MoO4(s);Ag
∣NaNO3(1-3x)m∥ ∥NaNO3(1-3x)m∣
by extrapolation method in the temperature range of 20° to 40℃.
Log Ks.p. = -9.506-1717/T+1.243×10¯2T
(2) The standard potential of the Ag ;Ag2MoO4(s) ;MoO4¯ electrode, and the molal heat and molal free energy for the solution of silver molybdate are expressed as a function of temperature over the temperature range of 20° to 40℃ as follows:
E°=-0.4573+1.19×10¯3(t-25)-5×10¯7(t-25)2.
△ H°=7857+5.687×10¯2T2
△ F°=7854+43.49T-5.687×10¯2T2
(3) The mola heat, free energy and entropy change for the formation od silver molybdate from its elements at 25℃ are evaluated as
△ H°228.1=-216.6Kcal./mol
△ F°228.1=-197.7Kcal./mol
△ S°288.1=-63.3cal./deg./mol. - 英文摘要: --
- 中文關鍵字: --
- 英文關鍵字: --