hydrogen nist data

Hydrogen http://webbook.nist.gov/cgi/cbook.cgi?ID=C1333740&Units=SI&Ma...

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HydrogenFormula: H2Molecular weight: 2.01588IUPAC Standard InChI:

InChI=1S/H2/h1HDownload the identifier in a file.

IUPAC Standard InChIKey: UFHFLCQGNIYNRP-UHFFFAOYSA-N

CAS Registry Number: 1333-74-0Chemical structure:

This structure is also available as a 2d Mol file .Isotopomers:

tritiumdeuterium hydrideDeuterium

Other names:Dihydrogen; o-Hydrogen; p-Hydrogen; Molecular hydrogen; H2; UN 1049; UN 1966Permanent linkfor this species. Use this link for bookmarking this species for future reference.Information on this page:

Gas Phase Heat Capacity (Shomate Equation)ReferencesNotes / Error Report

Other data available:Gas phase thermochemistry dataPhase change dataReaction thermochemistry data: reactions 1 to 50, reactions 51 to 100, reactions 101 to 150, reactions 151 to 200, reactions 201 to 250, reactions 251 to 300, reactions 301 to 350, reactions 351 to 400, reactions 401 to 450, reactions 451 to 500, reactions 501 to 550, reactions 551 to 600, reactions 601 to 621Henry's Law dataGas phase ion energetics dataIon clustering dataMass spectrum (electron ionization)Constants of diatomic moleculesFluid Properties

Data at other public NIST sites:Electron-Impact Ionization Cross Sections (on physics web site)Computational Chemistry Comparison and Benchmark DatabaseGas Phase Kinetics DatabasePublications database (on thermophysical properties of hydrogen web site)

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Data at NIST subscription sites:

NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)


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NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

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Gas Phase Heat Capacity (Shomate Equation)Go To: Top, References, Notes / Error Report

Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cp° = A + B*t + C*t2 + D*t3 + E/t2

H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − HS° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G Cp = heat capacity (J/mol*K) H° = standard enthalpy (kJ/mol) S° = standard entropy (J/mol*K) t = temperature (K) / 1000.

View table.

Temperature (K) 298. - 1000. 1000. - 2500. 2500. - 6000.

A 33.066178 18.563083 43.413560B -11.363417 12.257357 -4.293079C 11.432816 -2.859786 1.272428D -2.772874 0.268238 -0.096876E -0.158558 1.977990 -20.533862F -9.980797 -1.147438 -38.515158G 172.707974 156.288133 162.081354H 0.0 0.0 0.0Reference Chase, 1998 Chase, 1998 Chase, 1998

Comment

Data last reviewed in March, 1977; New parameter fit October 2001




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ReferencesGo To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes / Error Report

Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data,Monograph 9, 1998, 1-1951. [all data]

Notes / Error ReportGo To: Top, Gas Phase Heat Capacity (Shomate Equation), References

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hydrogen nist data

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