silver

Formula: Ag
Molecular weight: 107.8682
IUPAC Standard InChI: InChI=1S/Ag
IUPAC Standard InChIKey: BQCADISMDOOEFD-UHFFFAOYSA-N
CAS Registry Number: 7440-22-4
Chemical structure:
This structure is also available as a 2d Mol file
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Other data available:
- Gas phase ion energetics data
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NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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Gas phase thermochemistry data

Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, References, Notes

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	68.1 ± 0.2	kcal/mol	Review	Cox, Wagman, et al., 1984	CODATA Review value
Quantity	Value	Units	Method	Reference	Comment
S°_{gas,1 bar}	41.3473 ± 0.001	cal/mol*K	Review	Cox, Wagman, et al., 1984	CODATA Review value

Condensed phase thermochemistry data

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Quantity	Value	Units	Method	Reference	Comment
S°_{solid,1 bar}	10.17 ± 0.048	cal/mol*K	Review	Cox, Wagman, et al., 1984	CODATA Review value

Phase change data

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Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
P = vapor pressure (atm)
T = temperature (K)

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Temperature (K)	A	B	C	Reference	Comment
1823. to 2425.	1.94732	2505.533	-1194.947	Hartmann and Schneider, 1929	Coefficents calculated by NIST from author's data.

Reaction thermochemistry data

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Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

(CAS Reg. No. 12595-35-6 • 4294967295 silver ) + silver = CAS Reg. No. 12595-35-6

By formula: (CAS Reg. No. 12595-35-6 • 4294967295Ag) + Ag = CAS Reg. No. 12595-35-6

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	52.3 ± 1.8	kcal/mol	LPD	Shi, Spasov, et al., 1999	gas phase
Δ_rH°	54.9 ± 2.3	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag7- loss; Ag8- loss ca. 0.07 eV higher.

(CAS Reg. No. 12595-37-8 • 4294967295 silver ) + silver = CAS Reg. No. 12595-37-8

By formula: (CAS Reg. No. 12595-37-8 • 4294967295Ag) + Ag = CAS Reg. No. 12595-37-8

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	54.9 ± 1.8	kcal/mol	LPD	Shi, Spasov, et al., 1999	gas phase
Δ_rH°	57.0 ± 2.3	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag10- loss; Ag9- loss comparable.

(CAS Reg. No. 12595-33-4 • 4294967295 silver ) + silver = CAS Reg. No. 12595-33-4

By formula: (CAS Reg. No. 12595-33-4 • 4294967295Ag) + Ag = CAS Reg. No. 12595-33-4

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	57.2 ± 1.8	kcal/mol	LPD	Shi, Spasov, et al., 1999	gas phase
Δ_rH°	63.0 ± 2.3	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag6- loss; Ag5- loss comparable.

(CAS Reg. No. 12595-34-5 • 4294967295 silver ) + silver = CAS Reg. No. 12595-34-5

By formula: (CAS Reg. No. 12595-34-5 • 4294967295Ag) + Ag = CAS Reg. No. 12595-34-5

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38.05 ± 0.92	kcal/mol	LPD	Shi, Spasov, et al., 1999	gas phase
Δ_rH°	41.5 ± 3.2	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag7- loss as sole channel.

(CAS Reg. No. 12595-36-7 • 4294967295 silver ) + silver = CAS Reg. No. 12595-36-7

By formula: (CAS Reg. No. 12595-36-7 • 4294967295Ag) + Ag = CAS Reg. No. 12595-36-7

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	41.97 ± 0.92	kcal/mol	LPD	Shi, Spasov, et al., 1999	gas phase
Δ_rH°	44.7 ± 3.7	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag9- loss as sole channel.

(CAS Reg. No. 12595-31-2 • 4294967295 silver ) + silver = CAS Reg. No. 12595-31-2

By formula: (CAS Reg. No. 12595-31-2 • 4294967295Ag) + Ag = CAS Reg. No. 12595-31-2

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	42.4 ± 4.6	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag3- loss; Ag4- loss ca. 0.29 eV higher.

(CAS Reg. No. 66525-32-4 • 4294967295 silver ) + silver = CAS Reg. No. 66525-32-4

By formula: (CAS Reg. No. 66525-32-4 • 4294967295Ag) + Ag = CAS Reg. No. 66525-32-4

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	53.3 ± 2.3	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; for loss of Ag-; Ag2- loss is 0.30 eV higher

(CAS Reg. No. 12595-28-7 • 4294967295 silver ) + silver = CAS Reg. No. 12595-28-7

By formula: (CAS Reg. No. 12595-28-7 • 4294967295Ag) + Ag = CAS Reg. No. 12595-28-7

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	31.4 ± 5.5	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag3- loss; Ag2- loss ca. 0.3 eV higher.

(CAS Reg. No. 12595-32-3 • 4294967295 silver ) + silver = CAS Reg. No. 12595-32-3

By formula: (CAS Reg. No. 12595-32-3 • 4294967295Ag) + Ag = CAS Reg. No. 12595-32-3

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	41. ± 14.	kcal/mol	CIDT	Spasov, Lee, et al., 1999	gas phase; For Ag4- loss; Ag5- loss ca. 0.05 eV higher.

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Notes

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Hartmann and Schneider, 1929
Hartmann, H.; Schneider, R., Die Siedetemperaturen von Magnesium, Calcium, Strontium, Barium and Lithium, Z. Anorg. Allg. Chem., 1929, 180, 1, 275-283, https://doi.org/10.1002/zaac.19291800129 . [all data]

Shi, Spasov, et al., 1999
Shi, Y.; Spasov, V.A.; Ervin, K.M., Competitive fragmentation and electron loss kinetics of photoactivated silver cluster anions: Dissociation energies of Ag-n(-) (n=7-11), J. Chem. Phys., 1999, 111, 3, 938-949, https://doi.org/10.1063/1.479186 . [all data]

Spasov, Lee, et al., 1999
Spasov, V.A.; Lee, T.H.; Maberry, J.P.; Ervin, K.M., Measurement of the dissociation energies of anionic silver clusters (Ag-n(-), n = 2-11) by collision-induced dissociation, J. Chem. Phys., 1999, 110, 11, 5208-5217, https://doi.org/10.1063/1.478416 . [all data]

Notes

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Symbols used in this document:

S°_{gas,1 bar}	Entropy of gas at standard conditions (1 bar)
S°_{solid,1 bar}	Entropy of solid at standard conditions (1 bar)
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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