Potenciales químicos

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Table of chemical potentials
(compiled by Dr. Georg Job)
Ag-Au | B-Br | C | Ca-Cd | Cl-Cu | D-He | Hg-Kr | La-Mo | N-Nb | Ne-P | Pb-S | Sb-Sr | Te-U | V-Zr | Sources In the tables the values of approximately 1300 substances can be found, taken from the sources mentioned in the bibliography. Thescale is defined by:

µ = 0 for the elements in their most stable modification (except of phosphorus) under standard conditions, nuclear entropy neglected; µ = 0 for H+aq under standard conditions, entropy of H+aq equates zero; µ = 0 for egas under standard conditions. Therefore, the values for gaseous and hydratized ions are not directly comparable. Because of the neglection of the nuclear entropythis is also true for substances with a nuclear composition which differs from the natural one (isotopes, ortho- and parahydrogen).
Without further informations the values are valid

under standard conditions (T = 298 K, p = 101,3 kPa),

for dissolved substances at the standard concentration (1000 mol/m3), for gaseous or dissolved substances in an idealized state without intermolecularinteractions, for all substances in the natural isotope composition of the elements.
The µ values are expressed by the SI coherent unit “Gibbs”, abbreviated to G (= J/mol) (Since we constantly deal with values of the chemical potential, we are justified in giving this unit its own name, “Gibbs,” in a manner analogous to “Volt” for the electric potential difference.) The name has been proposed by E.WIBERG („Die chemische Affinität“, 1972, p. 164) to honour Josiah Willard GIBBS (1839 – 1903) who first introduced the concept of chemical potential. Instruction for use: The sequence of the elements in the molecular formulas is as follows: electropositive elements (metals, noble gases) - electronegative elements (non-metals without noble gases, O, H) - oxygen - hydrogen. The formula of water forexample is expressed as OH2, that of sulfuric acid as SO4H2.

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18/03/2008 11:39 p.m.

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Homepage > English > Data Collection

Ag - Au
Formula Ag Ag Ag Ag+ Ag2+ in perchloric acid (4m) AgBr AgCN Ag(CN)2AgCl AgCl AgCl2AgJ AgNO2 AgNO3 Ag(NH3)2+ AgN3 AgOH Ag(OH)2Ag2CO3 Ag2O Ag2O2 Ag2O3 Ag2S alpha, orthoromb. Ag2SO4 Al Al Al Al AlAl3+ Al3+ Al(BH4)3 AlBr3 Al(CH3)3 AlCl3 AlCl3 AlCl3 State of agg. gaseous gaseous solid aq. sol. aq. sol. solid solid aq. sol. solid aq. sol. aq. sol. solid solid solid aq. sol. solid aq. sol. aq. sol. solid solid solid solid solid solid gaseous gaseous liquid solid solid gaseous aq. sol. liquid solid liquid gaseous solid solid μ [kG] 245,68 245,69 0,00 77,12 269,03 -96,90 156,90 305,43 -109,80-72,80 -215,48 -66,19 19,08 -33,47 -17,24 376,14 -92,05 -260,24 -436,81 -11,21 27,61 121,34 -40,67 -618,48 285,77 285,77 6,61 0,00 0,00 5429,17 -485,34 144,77 -505,01 -10,04 -570,05 -628,86 -630,06 -167,36 -121,34 -117,15 -100,42 -144,01 -200,41 -164,43 -164,45 -35,23 -28,33 -28,32 -149,84 321,75 -289,11 -184,10 -209,41 -314,29 -110,67 -109,29 Temp. coeff. [G/K] -172,89 -172,88 -42,55 -72,68 87,86-107,11 -107,19 -192,46 -96,23 -153,97 -231,38 -115,48 -128,20 -140,92 -245,18 -104,18 Ref. 1 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 1 2 5 1 1 1 1 2 1 2

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18/03/2008 11:26 p.m.

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Formula AlF3 AlF3 AlF3 AlJ3 AlN Al(NO3)3 * 6 H2O AlO(OH) boehmite Al(OH)3 Al(OH)4AlPO4 berlinite Al2(CH3)6 Al2Cl6 Al2O3 Al2O3 alpha,corundum Al2O3 alpha, corundum Al2O3 gamma Al2(SO4)3 Al2(SO4)3 * 6 H2O Al2SiO5 andalusite Al2SiO5 cyanite Al2SiO5 sillimanite Al2Si2O7 * 2 H2O halloysite Al2Si2O7 * 2 H2O kaolinite Al4C3 Al6Si2O13 mullite Ar Ar As As grey, metallic AsCl3 AsCl3 AsFO32AsFO3HAsF3 AsN3 AsN3 AsN As(OH)2+ AsO3H2AsO3H3 AsO43-

State of agg. gaseous solid solid solid solid solid solid solid aq. sol. solid gaseous gaseous...
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