Table H.1 (continued)
Substance
State
DH° f
kJ
mol
S°
J
mol K
Substance
State
DH° f
kJ
mol
S°
J
mol K
C 2 H 4
g
+52.3
219.5
HCO 3
−
aq
−689.93
91.2
C 2 H 6
g
−84.7
229.5
HCl
g
−92.31
186.8
C 3 H 8
g
−103.8
269.9
HF
g
−273.30
173.7
CH 3 OH
l
−238.7
126.8
HI
g
26.50
206.5
C 2 H 5 OH
l
−277.7
160.7
HNO 3
l
−174.1
155.6
CO
g
−110.53
197.6
HPO 4
−2
aq
−1299.0
−33.5
CO 2
g
−393.51
213.6
HSO 4
−
aq
−886.9
131.8
CO 3
−2
aq
−675.23
−56.9
H 2 O
l
−285.830
69.9
Ca
s
0
41.4
H 2 O
g
−241.826
188.7
Ca
+2
aq
−543.0
−53.1
H 2 PO 4
−
aq
−1302.6
90.4
CaCl 2
s
−795.8
104.6
H 2 S
g
−20.6
205.7
CaCO 3
s
−1206.9
92.9
Hg
l
0
76.0
CaO
s
−634.92
39.8
Hg
+2
aq
170.21
−32.2
Ca(OH) 2
s
−986.1
83.4
HgO
cr,
red
−90.79
70.3
CaSO 4
s
−1434.1
106.7
Cd
s
0
51.8
Cd
+2
aq
−75.92
−73.2
CdCl 2
s
−391.5
115.3
CdO
s
−258.35
54.8
a The standard entropy of the H
+ (aq) ion is defined to be 0
248
Appendix H