Page 1253 - Chemistry--atom first

Appendix G
1243
Standard Thermodynamic Properties for Selected Substances
Substance
(kJ mol–)
(kJ mol–1)
(J K–1 mol–1)
Si(g)
450.0
405.5
168.0
SiO2(s)
–910.7
–856.3
41.5
SiH4(g)
34.3
56.9
204.6
H2SiO3(s)
–1188.67
–1092.44
133.89
H4SiO4(s)
–1481.14
–1333.02
192.46
SiF4(g)
–1615.0
–1572.8
282.8
SiCl4(l)
–687.0
–619.8
239.7
SiCl4(g)
–662.75
–622.58
330.62
SiC(s, beta cubic)
–73.22
–70.71
16.61
SiC(s, alpha hexagonal)
–71.55
–69.04
16.48
silver
Ag(s)
0
0
42.55
Ag(g)
284.9
246.0
172.89
Ag+(aq)
105.6
77.11
72.68
Ag2O(s)
–31.05
–11.20
121.3
AgCl(s)
–127.0
–109.8
96.3
Ag2S(s)
–32.6
–40.7
144.0
sodium
Na(s)
0
0
51.3
Na(g)
107.5
77.0
153.7
Na+(aq)
–240.1
–261.9
59
Na2O(s)
–414.2
–375.5
75.1
NaCl(s)
–411.2
–384.1
72.1
strontium
Sr2+(aq) –545.8 –557.3 –32.6
sulfur
S8(s) (rhombic)
0
0
256.8
S(g)
278.81
238.25
167.82
S2–(aq)
41.8
83.7
22
SO2(g)
–296.83
–300.1
248.2
SO3(g)
–395.72
–371.06
256.76
Table G1