Norflurane
- Formula: C2H2F4
- Molecular weight: 102.0309
- IUPAC Standard InChI: InChI=1S/C2H2F4/c3-1-2(4,5)6/h1H2
- IUPAC Standard InChIKey: LVGUZGTVOIAKKC-UHFFFAOYSA-N
- CAS Registry Number: 811-97-2
- Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript. - Other names: 1,1,1,2-Tetrafluoroethane; Ethane, 1,1,1,2-tetrafluoro-; Norfluran; R 134a; 1,2,2,2-Tetrafluoroethane; CF3CH2F; HFA-134a
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Phase change data
Go To: Top, References, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled as indicated in comments:
BS - Robert L. Brown and Stephen E. Stein
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tboil | 246.6 | K | N/A | PCR Inc., 1990 | BS |
| Tboil | 247.1 | K | N/A | Dietrich, 1952 | Uncertainty assigned by TRC = 2. K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Ttriple | 169.850 | K | N/A | Magee, 1992 | Uncertainty assigned by TRC = 0.01 K; TRC |
| Ttriple | 169.850 | K | N/A | Magee, 1992 | Uncertainty assigned by TRC = 0.01 K; TRC |
| Ttriple | 169.85 | K | N/A | Magee, 1992 | Uncertainty assigned by TRC = 0.02 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Tc | 374.1 ± 0.2 | K | AVG | N/A | Average of 13 out of 14 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| Pc | 40.0 ± 0.2 | atm | AVG | N/A | Average of 13 values; Individual data points |
| Quantity | Value | Units | Method | Reference | Comment |
| ρc | 5.00 ± 0.05 | mol/l | AVG | N/A | Average of 11 values; Individual data points |
Enthalpy of vaporization
| ΔvapH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 5.66 | 249. | I | Kul, DesMarteau, et al., 2001 | Based on data from 221. to 246. K.; AC |
| 6.31 | 180. | N/A | Blanke, Klingenberg, et al., 1998 | AC |
| 5.98 | 200. | N/A | Blanke, Klingenberg, et al., 1998 | AC |
| 5.69 | 220. | N/A | Blanke, Klingenberg, et al., 1998 | AC |
| 5.43 | 240. | N/A | Blanke, Klingenberg, et al., 1998 | AC |
| 5.26 | 294. | N/A | Zhu, Wu, et al., 1992 | Based on data from 279. to 363. K.; AC |
Enthalpy of fusion
| ΔfusH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 0.480 | 169.4 | Zhelezny, Katchurka, et al., 1999 | AC |
References
Go To: Top, Phase change data, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
PCR Inc., 1990
PCR Inc.,
Research Chemicals Catalog 1990-1991, PCR Inc., Gainesville, FL, 1990, 1. [all data]
Dietrich, 1952
Dietrich, S.R.,
Private Communication to J. A. Cuculo and L. A. Bigelow from du Pont Com., Wilmington, DE, 1952. [all data]
Magee, 1992
Magee, J.W.,
Measurement of molar heat capacity at constant volume (Cv) for 1,1,1,2-tetrafluoroethane (R134a),
Int. J. Refrig., 1992, 15, 372-80. [all data]
Kul, DesMarteau, et al., 2001
Kul, Ismail; DesMarteau, Darryl D.; Beyerlein, Adolph L.,
Vapor--liquid equilibria for CF3OCF2H/fluorinated ethane and CF3SF5/fluorinated ethane mixtures as potential R22 alternatives,
Fluid Phase Equilibria, 2001, 185, 1-2, 241-253, https://doi.org/10.1016/S0378-3812(01)00474-5
. [all data]
Blanke, Klingenberg, et al., 1998
Blanke, W.; Klingenberg, G.; Weber, F.,
International Journal of Thermophysics, 1998, 19, 3, 653-662, https://doi.org/10.1023/A:1022658015509
. [all data]
Zhu, Wu, et al., 1992
Zhu, Ming-Shan; Wu, Jiang; Fu, Yi-Dong,
New experimental vapor pressure data and a new vapor pressure equation for HFC134a,
Fluid Phase Equilibria, 1992, 80, 99-105, https://doi.org/10.1016/0378-3812(92)87058-U
. [all data]
Zhelezny, Katchurka, et al., 1999
Zhelezny, Vitaly; Katchurka, Yu; Pybnikov, M.,
Thermal properties of HFC-134a in liquid and solid states,
High Temp.-High Press., 1999, 31, 2, 169-172, https://doi.org/10.1068/htec251
. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Pc Critical pressure Tboil Boiling point Tc Critical temperature Ttriple Triple point temperature ΔfusH Enthalpy of fusion ΔvapH Enthalpy of vaporization ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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