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

Auxiliary Data

Reference States, Normal Boiling Point Convention

Additional fluid properties

References and Notes

Equation of state

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

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

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

Surface tension

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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