342 



Tem- 

 pera- 

 ture 



°C. 



-100 



- 90 



- 80 



- 70 



- 60 



- 50 



- 40 



Table 91 (concluded) 



PROPERTIES OF WATER VAPOR 



Cv = compressibility factor of water vapor, dimensionless, 

 Ahv = enthalpy residual of water vapor, ITcal. g."\ 

 As v =: entropy residual of water vapor, ITcal. g." 1 °K.~ 1 , 

 bcpv = isobaric specific heat residual of water vapor, ITcal. g 



r 1 °K. 



Vapor pressure — mb. 



Cv 



Ah v 

 Asv 

 Acpv 



Cv 



Ahv 



As v 

 Acpv 







1.0000 

 -.1 

 -.0004 

 .0009 



1.0000 

 -.1 

 -.0004 

 .0009 



1.0000 1.0000 



-.1 -.1 



-.0004 -.0004 



.0010 .0010 



Cv 1.0000 



AK .0 



As v -.0003 



Ac P v .0011 



1.0000 

 -.1 



-.0003 

 .0011 



Tem- 

 pera- 

 ture 



°C. 



-30 



-20 



-10 



Vapor pressure — mb. 



c„ 



Ahv 

 As v 

 Acpv 



Cv 



Ahv 

 As* 

 Acpv 



e { 



1.0000 .9999 



.0 .0 



.0000 .0000 



.0020 .0025 



1.0000 .9999 



.0 .0 



.0001 .0000 



.0023 .0032 



Cv 



Ah v 

 Asv 

 Acpv 



1.0000 1.0000 



.0 .0 



-.0003 -.0003 



.0012 .0012 



Cv 1.0000 .9997 



Ahv .1 .0 



A.r„ .0002 .0000 



Acpv .0027 .0042 



Cv 1.0000 .9995 



Ahv .1 .0 



Asv .0003 .0000 



Acpv .0031 .0056 



Cv 1.0000 1.0000 



Ahv .0 .0 



As v -.0002 -.0002 



Acpv .0014 .0014 



Cv 1.0000 1.0000 



Ahv .0 .0 



As v -.0001 -.0002 



Acpv .0015 .0017 



1.0000 



.0 

 -.0002 



.0017 



Cv 1.0000 1.0000 1.0000 



Ahv .0 .0 .0 



A*„ -.0001 -.0001 -.0001 



Ac P v .0017 .0020 .0021 



10 



20 



30 



Temperature 

 °C. 



40 



Vapor pressure — mb 



Cv 



Ahv 

 As v 



Acpv 



50 



1.0000 .9982 



.3 -.1 



.0009 .0000 



.0054 .0119 



50 



60 



Cv 1.0000 



A/i„ .3 



Asv .0011 



Acp V .0061 



Cv 1.0000 



Ahv .4 



Asv .0013 



Acpv .0069 



.9985 

 .0 



.0003 

 .0111 



100 



.9969 

 -.3 

 -.0004 



.0166 



.9999 

 .0 



-.0001 

 .0027 



.9998 

 .0 



.0000 

 .0034 



.9997 

 .0 



.0000 

 .0043 



.9995 

 .0 



.0000 

 .0056 



.9992 

 .0 



.0000 

 .0073 



-.1 



-.0001 

 .0094 



.9982 

 -.1 

 -.0003 



.0121 



.9987 .9974 .9961 .9948 

 .1 _.i _.4 _.6 



.0007 -.0001 -.0006 -.0012 

 .0108 .0150 .0195 .0241 



SMITHSONIAN METEOROLOGICAL TABLES 



