Chemical Properties of Hydrogen iodide (CAS 10034-85-2)

InChI

InChI=1S/HI/h1H

InChI Key

XMBWDFGMSWQBCA-UHFFFAOYSA-N

Formula

HI

SMILES

I

Molecular Weight¹

127.91

CAS

10034-85-2

Other Names

• anhydrous hydriodic acid
• hydriodic acid
• hydrogen iodide (HI)
• hydrogen monoiodide
• hydroiodic acid

• ω : Acentric Factor.
• PAff : Proton affinity (kJ/mol).
• BasG : Gas basicity (kJ/mol).
• C_p,gas : Ideal gas heat capacity (J/mol×K).
• C_p,liquid : Liquid phase heat capacity (J/mol×K).
• μ : Dipole Moment (debye).
• η : Dynamic viscosity (Pa×s).
• Δ_fG° : Standard Gibbs free energy of formation (kJ/mol).
• Δ_fH°_gas : Enthalpy of formation at standard conditions (kJ/mol).
• Δ_fusH° : Enthalpy of fusion at standard conditions (kJ/mol).
• Δ_vapH : Enthalpy of vaporization at a given temperature (kJ/mol).
• IE : Ionization energy (eV).
• logP_oct/wat : Octanol/Water partition coefficient.
• McVol : McGowan's characteristic volume (ml/mol).
• P_c : Critical Pressure (kPa).
• P_triple : Triple Point Pressure (kPa).
• P_vap : Vapor pressure (kPa).
• ρ_g : Gas Density (kg/m³).
• ρ_l : Liquid Density (kg/m³).
• γ : Surface Tension (N/m).
• T_boil : Normal Boiling Point Temperature (K).
• T_c : Critical Temperature (K).
• λ_gas : Gas thermal conductivity (W/m×K).
• λ_liquid : Liquid thermal conductivity (W/m×K).
• T_fus : Normal melting (fusion) point (K).
• T_triple : Triple Point Temperature (K).
• U_Qi : UNIQUAC Qi Parameter.
• U_Ri : UNIQUAC Ri Parameter.
• V_c : Critical Volume (m³/kmol).
• Z_c : Critical Compressibility.
• ¹: Molecular weight from the IUPAC atomic weights tables.

Physical Properties

Property	Value	Unit	Source
ω	[0.0381; 0.0500]
ω	0.0500		PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
ω	0.0381		ChemSep v8.3 pure component data Compiled value
ω	0.0490		KDB
PAff	627.50	kJ/mol	NIST
BasG	601.30	kJ/mol	NIST
μ	[0.45; 0.50]	debye
μ	0.45	debye	ChemSep v8.3 pure component data Compiled value
μ	0.50	debye	KDB
ΔfG°	[1.59; 1.72]	kJ/mol
ΔfG°	1.72	kJ/mol	ChemSep v8.3 pure component data Compiled value
ΔfG°	1.59	kJ/mol	KDB
ΔfH°gas	[26.38; 26.50]	kJ/mol
ΔfH°gas	26.47 ± 0.04	kJ/mol	Active Thermochemical Tables 1.112, gas-phase enthalpies of formation Compiled value
ΔfH°gas	26.50	kJ/mol	ChemSep v8.3 pure component data Compiled value
ΔfH°gas	26.38	kJ/mol	KDB
ΔfH°gas	26.50 ± 0.10	kJ/mol	NIST
ΔfusH°	1.84	kJ/mol	Joback Calculated Property
IE	[10.30; 10.42]	eV
IE	10.39 ± 0.00	eV	NIST
IE	10.38	eV	NIST
IE	10.39 ± 0.00	eV	NIST
IE	10.38 ± 0.01	eV	NIST
IE	10.42 ± 0.01	eV	NIST
IE	10.38 ± 0.02	eV	NIST
IE	Outlier 10.30 ± 0.10	eV	NIST
IE	10.39	eV	NIST
logPoct/wat	0.618		Crippen Calculated Property
McVol	36.680	ml/mol	McGowan Calculated Property
Pc	[8298.52; 8310.00]	kPa
Pc	8308.65	kPa	Mathews (1972), critical constants of inorganic substances Compiled value
Pc	8298.52	kPa	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Pc	8310.00	kPa	ChemSep v8.3 pure component data Compiled value
Pc	8300.00	kPa	Air Liquide Gas Encyclopedia
Pc	8310.00	kPa	KDB
Ptriple	[6.76; 49.33]	kPa
Ptriple	6.76	kPa	Staveley, Lobo and Calado (1981), triple points Compiled value
Ptriple	49.33	kPa	ChemSep v8.3 pure component data Compiled value
Tboil	[237.55; 237.75]	K
Tboil	237.55	K	ChemSep v8.3 pure component data Compiled value
Tboil	237.75	K	Air Liquide Gas Encyclopedia
Tboil	237.60	K	KDB
Tc	[423.15; 424.00]	K
Tc	424.00	K	Mathews (1972), critical constants of inorganic substances Compiled value
Tc	423.15	K	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Tc	423.85	K	ChemSep v8.3 pure component data Compiled value
Tc	423.95	K	Air Liquide Gas Encyclopedia
Tc	424.00	K	KDB
Tfus	[222.15; 222.38]	K
Tfus	222.38	K	ChemSep v8.3 pure component data Compiled value
Tfus	222.15	K	Air Liquide Gas Encyclopedia
Tfus	222.38	K	KDB
Tfus	222.15 ± 1.50	K	NIST
Ttriple	[222.38; 222.51]	K
Ttriple	222.51	K	Staveley, Lobo and Calado (1981), triple points Compiled value
Ttriple	222.38	K	ChemSep v8.3 pure component data Compiled value
UQi	1.59		ChemSep v8.3 pure component data Compiled value
URi	1.67		ChemSep v8.3 pure component data Compiled value
Vc	[0.122; 0.131]	m3/kmol
Vc	0.131	m3/kmol	PSRK revision IV (2005), critical constants and acentric factors of 1000 components Compiled value
Vc	0.122	m3/kmol	ChemSep v8.3 pure component data Compiled value
Zc	0.2870000		ChemSep v8.3 pure component data Compiled value

Cheméo can also estimate Enthalpy of vaporization at standard conditions, Log10 of Water solubility in mol/l for this compound, but they fall outside the models' validated range, so they are not shown here. Open the prediction tool to compute them on demand.

Temperature Dependent Properties

Property	Value	Unit	Temperature (K)	Source
ΔvapH	[19.73; 19.80]	kJ/mol	[237.75; 238.00]
ΔvapH	19.73	kJ/mol	237.75	Air Liquide Gas Encyclopedia
ΔvapH	19.80	kJ/mol	238.00	NIST
ρg	[5.46; 5.79]	kg/m3	[237.75; 288.15]
ρg	5.79	kg/m3	237.75	Air Liquide Gas Encyclopedia
ρg	5.46	kg/m3	288.15	Air Liquide Gas Encyclopedia
ρl	[2797.00; 2799.99]	kg/m3	[237.00; 237.75]
ρl	2799.99	kg/m3	237.00	KDB
ρl	2797.00	kg/m3	237.75	Air Liquide Gas Encyclopedia

Correlations

Property	Value	Unit	Temperature (K)	Source
Cp,gas	[29.07; 35.29]	J/mol×K	[50.00; 1500.00]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is Cp,gas in J/mol×K, T in K
Coefficient A			2.90709e+01
Coefficient B			-1.60095e+03
Coefficient C			2.53801e+00
Coefficient D			9.14155e-04
Coefficient E			-4.50666e-07
Temperature range, min.			50.00
Temperature range, max.			1500.00
Cp,gas	29.07	J/mol×K	50.00	Calculated Property
Cp,gas	29.08	J/mol×K	211.11	Calculated Property
Cp,gas	29.30	J/mol×K	372.22	Calculated Property
Cp,gas	29.97	J/mol×K	533.33	Calculated Property
Cp,gas	30.99	J/mol×K	694.44	Calculated Property
Cp,gas	32.13	J/mol×K	855.56	Calculated Property
Cp,gas	33.24	J/mol×K	1016.67	Calculated Property
Cp,gas	34.18	J/mol×K	1177.78	Calculated Property
Cp,gas	34.87	J/mol×K	1338.89	Calculated Property
Cp,gas	35.29	J/mol×K	1500.00	Calculated Property
Cp,gas	[29.18; 35.02]	J/mol×K	[298.00; 1400.00]	NIST
Equation			Y = A + B·t + C·t² + D·t³ + E/t², t = T/1000 Y is Cp,gas in J/mol×K, T in K
Coefficient A			2.60454e+01
Coefficient B			4.68968e+00
Coefficient C			4.91176e+00
Coefficient D			-2.65440e+00
Coefficient E			1.21419e-01
Reference			Chase, 1998
Comment			F=18.75499, G=237.2018, H=26.35903; Data last reviewed in September, 1961
Temperature range, min.			298.00
Temperature range, max.			1400.00
Cp,gas	29.18	J/mol×K	298.00	Calculated Property
Cp,gas	29.37	J/mol×K	420.44	Calculated Property
Cp,gas	30.03	J/mol×K	542.89	Calculated Property
Cp,gas	30.83	J/mol×K	665.33	Calculated Property
Cp,gas	31.69	J/mol×K	787.78	Calculated Property
Cp,gas	32.53	J/mol×K	910.22	Calculated Property
Cp,gas	33.32	J/mol×K	1032.67	Calculated Property
Cp,gas	34.02	J/mol×K	1155.11	Calculated Property
Cp,gas	34.59	J/mol×K	1277.56	Calculated Property
Cp,gas	35.02	J/mol×K	1400.00	Calculated Property
Cp,gas	[35.03; 39.81]	J/mol×K	[1400.00; 6000.00]	NIST
Equation			Y = A + B·t + C·t² + D·t³ + E/t², t = T/1000 Y is Cp,gas in J/mol×K, T in K
Coefficient A			3.54436e+01
Coefficient B			1.41471e+00
Coefficient C			-1.82088e-01
Coefficient D			1.17680e-02
Coefficient E			-4.05456e+00
Reference			Chase, 1998
Comment			F=7.919099, G=240.1097, H=26.35903; Data last reviewed in September, 1961
Temperature range, min.			1400.00
Temperature range, max.			6000.00
Cp,gas	35.03	J/mol×K	1400.00	Calculated Property
Cp,gas	36.45	J/mol×K	1911.11	Calculated Property
Cp,gas	37.28	J/mol×K	2422.22	Calculated Property
Cp,gas	37.85	J/mol×K	2933.33	Calculated Property
Cp,gas	38.30	J/mol×K	3444.44	Calculated Property
Cp,gas	38.66	J/mol×K	3955.56	Calculated Property
Cp,gas	38.98	J/mol×K	4466.67	Calculated Property
Cp,gas	39.26	J/mol×K	4977.78	Calculated Property
Cp,gas	39.53	J/mol×K	5488.89	Calculated Property
Cp,gas	39.81	J/mol×K	6000.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
Cp,liquid	[60.38; 59.10]	J/mol×K	[222.37; 237.81]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is Cp,liquid in J/mol×K, T in K
Coefficient A			4.72280e+01
Coefficient B			6.57180e+02
Coefficient C			-4.65846e+00
Coefficient D			3.17780e-02
Coefficient E			-5.63650e-05
Temperature range, min.			222.37
Temperature range, max.			237.81
Cp,liquid	60.38	J/mol×K	222.37	Calculated Property
Cp,liquid	60.23	J/mol×K	224.09	Calculated Property
Cp,liquid	60.08	J/mol×K	225.80	Calculated Property
Cp,liquid	59.94	J/mol×K	227.52	Calculated Property
Cp,liquid	59.80	J/mol×K	229.23	Calculated Property
Cp,liquid	59.65	J/mol×K	230.95	Calculated Property
Cp,liquid	59.52	J/mol×K	232.66	Calculated Property
Cp,liquid	59.38	J/mol×K	234.38	Calculated Property
Cp,liquid	59.24	J/mol×K	236.09	Calculated Property
Cp,liquid	59.10	J/mol×K	237.81	Calculated Property

Property	Value	Unit	Temperature (K)	Source
η	[0.0014683; 0.0012412]	Pa×s	[222.38; 242.89]	ChemSep v8.3 pure component data Compiled value
Equation			Y = exp(A + B/T + C·ln(T) + D·T^E) Y is η in Pa×s, T in K
Coefficient A			-2.04490e+01
Coefficient B			-9.59410e+02
Coefficient C			4.24450e+00
Coefficient D			-9.50250e-05
Coefficient E			2.00000e+00
Temperature range, min.			222.38
Temperature range, max.			242.89
η	0.0014683	Pa×s	222.38	Calculated Property
η	0.0014541	Pa×s	224.66	Calculated Property
η	0.0014366	Pa×s	226.94	Calculated Property
η	0.0014162	Pa×s	229.22	Calculated Property
η	0.0013929	Pa×s	231.50	Calculated Property
η	0.0013670	Pa×s	233.77	Calculated Property
η	0.0013387	Pa×s	236.05	Calculated Property
η	0.0013081	Pa×s	238.33	Calculated Property
η	0.0012756	Pa×s	240.61	Calculated Property
η	0.0012412	Pa×s	242.89	Calculated Property

Property	Value	Unit	Temperature (K)	Source
ΔvapH	[20.67; 4.42]	kJ/mol	[222.38; 416.26]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A·(1 − Tr)^(B + C·Tr + D·Tr² + E·Tr³), Tr = T/Tc Y is ΔvapH in kJ/mol, T in K
Coefficient A			4.50570e+01
Coefficient B			2.40360e+00
Coefficient C			-3.41660e+00
Coefficient D			1.58770e+00
Coefficient E			-2.70340e-03
Critical temperature, Tc (K)			4.23850e+02
Temperature range, min.			222.38
Temperature range, max.			416.26
ΔvapH	20.67	kJ/mol	222.38	Calculated Property
ΔvapH	19.75	kJ/mol	243.92	Calculated Property
ΔvapH	18.84	kJ/mol	265.46	Calculated Property
ΔvapH	17.89	kJ/mol	287.01	Calculated Property
ΔvapH	16.82	kJ/mol	308.55	Calculated Property
ΔvapH	15.57	kJ/mol	330.09	Calculated Property
ΔvapH	14.00	kJ/mol	351.63	Calculated Property
ΔvapH	11.96	kJ/mol	373.18	Calculated Property
ΔvapH	9.12	kJ/mol	394.72	Calculated Property
ΔvapH	4.42	kJ/mol	416.26	Calculated Property

Property	Value	Unit	Temperature (K)	Source
Pvap	[49.31; 8245.03]	kPa	[222.38; 423.85]	The Yaws Handbook of Vapor Pressure
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.40816e+01
Coefficient B			-2.02965e+03
Coefficient C			-2.30700e+01
Temperature range, min.			222.38
Temperature range, max.			423.85
Pvap	49.31	kPa	222.38	Calculated Property
Pvap	137.89	kPa	244.77	Calculated Property
Pvap	319.30	kPa	267.15	Calculated Property
Pvap	642.08	kPa	289.54	Calculated Property
Pvap	1158.65	kPa	311.92	Calculated Property
Pvap	1920.60	kPa	334.31	Calculated Property
Pvap	2974.87	kPa	356.69	Calculated Property
Pvap	4361.16	kPa	379.08	Calculated Property
Pvap	6110.53	kPa	401.46	Calculated Property
Pvap	8245.03	kPa	423.85	Calculated Property
Pvap	[39.35; 8266.96]	kPa	[217.95; 423.85]	ChemSep v8.3 pure component data Compiled value
Equation			Y = exp(A + B/T + C·ln(T) + D·T^E) Y is Pvap in kPa, T in K
Coefficient A			4.13002e+01
Coefficient B			-3.30950e+03
Coefficient C			-4.22020e+00
Coefficient D			5.88680e-06
Coefficient E			2.00000e+00
Temperature range, min.			217.95
Temperature range, max.			423.85
Pvap	39.35	kPa	217.95	Calculated Property
Pvap	116.23	kPa	240.83	Calculated Property
Pvap	279.42	kPa	263.71	Calculated Property
Pvap	576.85	kPa	286.58	Calculated Property
Pvap	1061.53	kPa	309.46	Calculated Property
Pvap	1788.43	kPa	332.34	Calculated Property
Pvap	2813.26	kPa	355.22	Calculated Property
Pvap	4193.10	kPa	378.09	Calculated Property
Pvap	5988.55	kPa	400.97	Calculated Property
Pvap	8266.96	kPa	423.85	Calculated Property
Pvap	[0.14; 99.44]	kPa	[149.80; 238.10]	NIST
Equation			ln(Y) = A + B/(T + C) Y is Pvap in kPa, T in K
Coefficient A			1.44338e+01
Coefficient B			-2.16442e+03
Coefficient C			-1.80120e+01
Reference			Stull, 1947
Comment			Coefficents calculated by NIST from author's data.
Temperature range, min.			149.80
Temperature range, max.			238.10
Pvap	0.14	kPa	149.80	Calculated Property
Pvap	0.43	kPa	159.61	Calculated Property
Pvap	1.15	kPa	169.42	Calculated Property
Pvap	2.74	kPa	179.23	Calculated Property
Pvap	5.92	kPa	189.04	Calculated Property
Pvap	11.77	kPa	198.86	Calculated Property
Pvap	21.79	kPa	208.67	Calculated Property
Pvap	37.97	kPa	218.48	Calculated Property
Pvap	62.85	kPa	228.29	Calculated Property
Pvap	99.44	kPa	238.10	Calculated Property

Property	Value	Unit	Temperature (K)	Source
ρl	[2859.95; 1123.82]	kg/m3	[222.38; 422.00]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A / B^(1 + (1 − T/C)^D) Y is ρl in kg/m3, T in K
Coefficient A			3.71048e+01
Coefficient B			1.02720e-01
Coefficient C			4.23850e+02
Coefficient D			1.28020e-01
Temperature range, min.			222.38
Temperature range, max.			422.00
ρl	2859.95	kg/m3	222.38	Calculated Property
ρl	2773.58	kg/m3	244.56	Calculated Property
ρl	2680.40	kg/m3	266.74	Calculated Property
ρl	2578.72	kg/m3	288.92	Calculated Property
ρl	2466.06	kg/m3	311.10	Calculated Property
ρl	2338.48	kg/m3	333.28	Calculated Property
ρl	2189.19	kg/m3	355.46	Calculated Property
ρl	2004.38	kg/m3	377.64	Calculated Property
ρl	1746.70	kg/m3	399.82	Calculated Property
ρl	1123.82	kg/m3	422.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
γ	[0.03; 0.00]	N/m	[222.38; 413.25]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is γ in N/m, T in K
Coefficient A			-5.24700e-02
Coefficient B			5.66300e+00
Coefficient C			-2.17060e+00
Coefficient D			-1.36060e-03
Coefficient E			-1.20450e-06
Temperature range, min.			222.38
Temperature range, max.			413.25
γ	0.03	N/m	222.38	Calculated Property
γ	0.03	N/m	243.59	Calculated Property
γ	0.02	N/m	264.80	Calculated Property
γ	0.02	N/m	286.00	Calculated Property
γ	0.02	N/m	307.21	Calculated Property
γ	0.01	N/m	328.42	Calculated Property
γ	0.01	N/m	349.63	Calculated Property
γ	0.01	N/m	370.83	Calculated Property
γ	0.00	N/m	392.04	Calculated Property
γ	0.00	N/m	413.25	Calculated Property

Property	Value	Unit	Temperature (K)	Source
λgas	[0.00; 0.02]	W/m×K	[230.00; 1000.00]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A·T^B / (1 + C/T + D/T²) Y is λgas in W/m×K, T in K
Coefficient A			4.23430e-05
Coefficient B			8.98060e-01
Coefficient C			4.47830e+01
Coefficient D			-3.96620e+01
Temperature range, min.			230.00
Temperature range, max.			1000.00
λgas	0.00	W/m×K	230.00	Calculated Property
λgas	0.01	W/m×K	315.56	Calculated Property
λgas	0.01	W/m×K	401.11	Calculated Property
λgas	0.01	W/m×K	486.67	Calculated Property
λgas	0.01	W/m×K	572.22	Calculated Property
λgas	0.01	W/m×K	657.78	Calculated Property
λgas	0.02	W/m×K	743.33	Calculated Property
λgas	0.02	W/m×K	828.89	Calculated Property
λgas	0.02	W/m×K	914.44	Calculated Property
λgas	0.02	W/m×K	1000.00	Calculated Property

Property	Value	Unit	Temperature (K)	Source
λliquid	[0.05; 0.02]	W/m×K	[225.19; 420.42]	ChemSep v8.3 pure component data Compiled value
Equation			Y = A + exp(B/T + C + D·T + E·T²) Y is λliquid in W/m×K, T in K
Coefficient A			-2.84100e-01
Coefficient B			2.11700e+01
Coefficient C			-1.29900e+00
Coefficient D			9.68570e-04
Coefficient E			-2.00560e-06
Temperature range, min.			225.19
Temperature range, max.			420.42
λliquid	0.05	W/m×K	225.19	Calculated Property
λliquid	0.05	W/m×K	246.88	Calculated Property
λliquid	0.05	W/m×K	268.57	Calculated Property
λliquid	0.04	W/m×K	290.27	Calculated Property
λliquid	0.04	W/m×K	311.96	Calculated Property
λliquid	0.04	W/m×K	333.65	Calculated Property
λliquid	0.03	W/m×K	355.34	Calculated Property
λliquid	0.03	W/m×K	377.04	Calculated Property
λliquid	0.02	W/m×K	398.73	Calculated Property
λliquid	0.02	W/m×K	420.42	Calculated Property

Similar Compounds

Find more compounds similar to Hydrogen iodide.

Mixtures

• Hydrogen iodide + Water
• Iodine + Hydrogen iodide + Water

Sources

• Air Liquide Gas Encyclopedia
• Active Thermochemical Tables 1.112, gas-phase enthalpies of formation ChEDL chemicals 1.5.2, from Active Thermochemical Tables (ATcT), version 1.112, Argonne National Laboratory; Ruscic, B. et al. Active Thermochemical Tables: Thermochemistry for the 21st Century. J. Phys.: Conf. Ser. 2005, 16, 561.
• Mathews (1972), critical constants of inorganic substances ChEDL chemicals 1.5.2, from Mathews, J. F. Critical Constants of Inorganic Substances. Chem. Rev. 1972, 72, 71-100.
• PSRK revision IV (2005), critical constants and acentric factors of 1000 components ChEDL chemicals 1.5.2, from Horstmann, S.; Jabłoniec, A.; Krafczyk, J.; Fischer, K.; Gmehling, J. PSRK Group Contribution Equation of State: Comprehensive Revision and Extension IV, Including Critical Constants and α-Function Parameters for 1000 Components. Fluid Phase Equilib. 2005, 227, 157-164.
• Staveley, Lobo and Calado (1981), triple points ChEDL chemicals 1.5.2, from Staveley, L. A. K.; Lobo, L. Q.; Calado, J. C. G. Triple-Points of Low Melting Substances and Their Use in Cryogenic Work. Cryogenics 1981, 21, 131-144.
• ChemSep v8.3 pure component data Converted from ChemSep v8.3 pure component data, H. Kooijman and R. Taylor (2021, 2022), Artistic License 2.0; see how the values differ.
• Crippen Method
• Crippen Method
• Vapor-Liquid Equilibria for the HI + H2O System and the HI + H2O + I2 System
• Joback Method
• KDB
• McGowan Method
• NIST Webbook
• The Yaws Handbook of Vapor Pressure

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