Related Resources: calculators

### Vapor Saturation Pressure Over Ice Formulas and Calculator

Vapor Saturation Pressure Over Ice Formulas and Calculator

The saturation (sublimation) pressure over ice for the temperature range of –148 to 32°F is given by:

Equation 1
ln pw, s = C1/T + C2 + C3T + C4T2 + C5T3 + C6T4 + C7 ln T

Formula given by IPAWS R7-97(2012) and R14-08 (2011).

Where:

pw, s = saturation pressure, psia
T = absolute temperature, °R = °F + 459.67
C1 = –1.0214165 E+04
C2 = –4.8932428 E+00
C3 = –5.3765794 E–03
C4 = 1.9202377 E–07
C5 = 3.5575832 E–10
C6 = –9.0344688 E–14
C7 = 4.1635019 E+00

Table 1 - Derived from Equation 1

 Temperature Saturation Pressure psia ˚ F ˚ R psia Pa 32 491.7 9.5518E-11 6.586E-07 20 479.7 5.3685E-11 3.701E-07 8 467.7 2.9355E-11 2.024E-07 -4 455.7 1.5584E-11 1.075E-07 -16 443.7 8.0145E-12 5.526E-08 -28 431.7 3.9823E-12 2.746E-08 -40 419.7 1.9065E-12 1.314E-08 -52 407.7 8.7655E-13 6.044E-09 -64 395.7 3.8567E-13 2.659E-09 -76 383.7 1.6174E-13 1.115E-09 -88 371.7 6.4351E-14 4.437E-10 -100 359.7 2.4166E-14 1.666E-10 -112 347.7 8.5156E-15 5.871E-11 -124 335.7 2.7966E-15 1.928E-11 -136 323.7 8.4938E-16 5.856E-12 -148 311.7 2.3644E-16 1.630E-12

Related:

References: