Thermodynamics and Chemistry

Appendix H Standard Molar Thermodynamic Properties

Appendix H Standard Molar Thermodynamic Properties

The values in this table are for a temperature of298:15K (25:00C) and the standard pres-
surepD 1 bar. Solute standard states are based on molality. A crystalline solid is denoted
by cr.
Most of the values in this table come from a project of the Committee on Data for Sci-
ence and Technology (CODATA) to establish a set of recommended, internally consistent
values of thermodynamic properties. The values ofÅfHandSmshown with uncertainties
are values recommended by CODATA.^1

Species

ÅfH

kJ mol^1

Sm

J K^1 mol^1

ÅfG

kJ mol^1

Inorganic substances

Ag(cr) 0 42. 55 0:20 0

AgCl(cr)  127. 01 0:05 96. 25 0:20  109. 77

C(cr, graphite) 0 5. 74 0:10 0

CO(g)  110. 53 0:17 197. 660 0:004  137 .17

CO 2 (g)  393. 51 0:13 213. 785 0:010  394 .41

Ca(cr) 0 41. 59 0:40 0

CaCO 3 (cr, calcite)  1206 .9 92.9  1128 .8

CaO(cr)  634. 92 0:90 38. 1 0:4  603 .31

Cl 2 (g) 0 223. 081 0:010 0

F 2 (g) 0 202. 791 0:005 0

H 2 (g) 0 130. 680 0:003 0

HCl(g)  92. 31 0:10 186. 902 0:005  95 .30

HF(g)  273. 30 0:70 173. 779 0:003  275 .40

HI(g) 26. 50 0:10 206. 590 0:004 1.70

H 2 O(l)  285. 830 0:040 69. 95 0:03  237 .16

H 2 O(g)  241. 826 0:040 188. 835 0:010  228 .58

H 2 S(g)  20. 6 0:5 205. 81 0:05  33 .44

(^1) Ref. [ 38 ]; also available online athttp://www.codata.org.

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