![]() So, the entropy change for the system when 2. Since 2.42 moles of H2(g) react, the total entropy change for the system is: The entropy change for the system is given by: The standard entropy values for H2(g), F2(g), and HF(g) are 130.6 J/mol įor the first reaction, we need to find the entropy change for the system when 2.42 moles of H2(g) react at standard conditions. Using standard thermodynamic data at 298K, calculate the entropyįor the first reaction, we need to find the entropy change for the system when 2.42 moles of H2(g) react at standard conditions. A general reaction searchĪlso available.Using standard absolute entropies at 298K, calculate the entropy Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, References, Notes SRD 156 – Clathrate Hydrate Physical Property Database SRSD 3 – Web Thermo Tables (WTT), professional edition SRSD 2 – Web Thermo Tables (WTT), "lite" edition SRD 103b – Thermo Data Engine (TDE) for pure compounds, SRD 103a – Thermo Data Engine (TDE) for pure compounds. (TRC) data available from this site, much more physicalĪnd chemical property data is available from the In addition to the Thermodynamics Research Center PVT and vapor pressure data TRCĬoefficents calculated by NIST from author's data. Uncertainty assigned by TRC = 0.083 mol/l based on analysis of obs. Uncertainty assigned by TRC = 0.2 mol/l TRC Uncertainty assigned by TRC = 0.0001 bar TRC Uncertainty assigned by TRC = 0.30 bar TRC PVT and vapor pressure data some other data from literature TRC Uncertainty assigned by TRC = 0.25 bar based on analysis of their obs. Uncertainty assigned by TRC = 0.12 bar TRC Uncertainty assigned by TRC = 0.05 bar TRC Uncertainty assigned by TRC = 1.×10 -7 bar TRC TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny directorĪverage of 7 values Individual data points Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, References, Notes ![]() Liquid Phase Heat Capacity (Shomate Equation) Go To: Top, Gas phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, References, Notes Requires a JavaScript / HTML 5 canvas capable browser. Gas Phase Heat Capacity (Shomate Equation) Secretary of Commerce on behalf of the U.S.A. Go To: Top, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, IR Spectrum, Mass spectrum (electron ionization), Vibrational and/or electronic energy levels, References, Notesīy the U.S. ![]() Your institution may already be a subscriber.įollow the links above to find out more about the data With the development of data collections included in The purpose of the fee is to recover costs associated NIST subscription sites provide data under theĭata Program, but require an annual fee to access. NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data).NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data).X-ray Photoelectron Spectroscopy Database, version 5.0.Why is it possible to measure absolute entropies. Computational Chemistry Comparison and Benchmark Database The entropy of 1 mol of a substance at a standard temperature of 298 K is its standard molar entropy (S).Electron-Impact Ionization Cross Sections (on physics web site).Microwave spectra (on physics lab web site).Vibrational and/or electronic energy levels.Reaction thermochemistry data (reactions 1 to 50).Use this link for bookmarking this species This structure is also available as a 2d Mol file IUPAC Standard InChIKey: XLYOFNOQVPJJNP-UHFFFAOYSA-N Copy.
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