Isobaric Properties for 1,1,1,3,3-Pentafluoropropane (R245fa)
- Fluid Data
- Auxiliary Data
- References and Notes
- Notes
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Fluid Data
Isobaric Data for P = 1.0000 bar
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Auxiliary Data
Reference States, Normal Boiling Point Convention
Enthalpy | H = 0 at the normal boiling point for saturated liquid. |
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Entropy | S = 0 at the normal boiling point for saturated liquid. |
Additional fluid properties
Critical temperature (Tc) | 153.86 C |
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Critical pressure (Pc) | 36.510 bar |
Critical density (Dc) | 519.4 kg/m3 |
Acentric factor | 0.3783 |
Normal boiling point | 15.048 C |
Dipole moment | 1.549 Debye |
References and Notes
Equation of state
Akasaka, R.; Zhou, Y.; Lemmon, E.W., A Fundamental Equation of State for 1,1,1,3,3-Pentafluoropropane (R-245fa), J. Phys. Chem. Ref. Data, 2015, 44, 1, 013104, https://doi.org/10.1063/1.4913493 . [all data]The estimated uncertainties are 0.1 % for vapor pressures, 0.1 % for saturated liquid densities, 0.1 % for liquid densities below 70 MPa, 0.2 % for densities at higher pressures, 0.3 % for vapor densities, 0.3 % for liquid sound speeds, and 0.1 % for vapor sound speeds. The uncertainties in the critical region are higher for all properties except vapor pressures.
Auxillary model, Cp0
Akasaka, R., Zhou, Y., and Lemmon, E.W., 2015.
Auxillary model, PX0
Akasaka, R., Zhou, Y., and Lemmon, E.W., 2015.
Auxillary model, PH0
Akasaka, R., Zhou, Y., and Lemmon, E.W., 2015.
Viscosity
Perkins, R.A.; Huber, M.L.; Assael, M.J., Measurements of the Thermal Conductivity of 1,1,1,3,3-Pentafluoropropane (R245fa) and Correlations for the Viscosity and Thermal Conductivity Surfaces, J. Chem. Eng. Data, 2016, 61, 9, 3286-3294, https://doi.org/10.1021/acs.jced.6b00350 . [all data]The estimated uncertainty for the dilute gas region is 2%, for the liquid phase at pressures to 40 MPa is 3%.
Auxillary model, the collision integral
Perkins et al., 2016.
Thermal conductivity
Perkins, R.A.; Huber, M.L.; Assael, M.J., Measurements of the Thermal Conductivity of 1,1,1,3,3-Pentafluoropropane (R245fa) and Correlations for the Viscosity and Thermal Conductivity Surfaces, J. Chem. Eng. Data, 2016, 61, 9, 3286-3294, https://doi.org/10.1021/acs.jced.6b00350 . [all data]The estimated uncertainty is 2 % for the liquid phase at pressures to 70 MPa, and 2 % for the vapor phase.
Auxillary model, the thermal conductivity critical enhancement
Perkins, R.A.; Sengers, J.V.; Abdulagatov, I.M.; Huber, M.L., Simplified Model for the Critical Thermal-Conductivity Enhancement in Molecular Fluids, Int. J. Thermophys., 2013, 34, 2, 191-212, https://doi.org/10.1007/s10765-013-1409-z . [all data]Surface tension
Mulero, A.; Cachadiña, I.; Parra, M.I., Recommended Correlations for the Surface Tension of Common Fluids, J. Phys. Chem. Ref. Data, 2012, 41, 4, 043105, https://doi.org/10.1063/1.4768782 . [all data]Vapor pressure
Gao, K., 2017.
Functional Form: P=Pc*EXP[SUM(Ni*Theta^ti)*Tc/T] where Theta=1-T/Tc, Tc and Pc are the reducing parameters below, which are followed by rows containing Ni and ti.
Saturated liquid density
Akasaka et al., 2015.
Functional Form: D=Dc*[1+SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are the reducing parameters below, which are followed by rows containing Ni and ti.
Saturated liquid volume
Gao, K., 2017.
Functional Form: D=Dc*EXP[SUM(Ni*Theta^ti)] where Theta=1-T/Tc, Tc and Dc are the reducing parameters below, which are followed by rows containing Ni and ti.
Notes
- Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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