Thermodynamic Properties of Substances and Ions at 25° C

The thermodyamic properties are arranged by group from the periodic table. Click on the group to access the table for that group.

Group VA

For one mole at 298K and 1 atmosphere pressure
Substance (form)
Enthalpy
DfH (kJ)
Gibbs
DfG (kJ)
Entropy
(J/ K
N(g)
473
456
153.2
N2(g)
0
0
191.5
NO(g)
90.29
86.60
210.65
NO2(g)
33.2
51
239.9
N2O4(g)
9.16
97.7
304.3
N2O5(g)
11
118
346
NH3(g)
-45.9
-16
193
NH3(aq)
-80.83
26.7
110
NO3-(aq)
-206.57
-110.5
146
HNO3(l)
-173.23
-79.914
155.6
HNO3(aq)
-206.57
-110.5
146
P(g)
333.9
292
163.1
P(red)
0
0
22.8
P4(white)
68
48
164
P2(g)
179
127
218
P4(g)
129
72.5
280
PCl3(g)
-271
-258
312
PCl5(g)
-382
-313
353
P4O10(s)
-2942
-2675
229
PO43-(aq)
-1266
-1013
-218
HPO42-(aq)
-1281
-1082
-36
H2PO4-(aq)
-1285
-1135
89.1
H3PO4(aq)
-1277
...
...

Group VIA

For one mole at 298K and 1 atmosphere pressure
Substance (form)
Enthalpy
DfH (kJ)
Gibbs
DfG (kJ)
Entropy
(J/ K
O(g)
249.2
231.7
160.95
O2(g)
0
0
205.0
O3(g)
143
163
238.82
OH-(aq)
-229.94
-157.30
-10.54
H2O(g)
-241.826
-228.60
188.72
H2O(l)
-285.840
-237.192
69.940
H2O2(l)
-187.8
-120.4
110
H2O2(aq)
-191.2
-134.1
144
S(g)
279
239
168
S2(g)
129
80.1
228.1
S(rhombic)
0
0
31.9
S(monoclinic)
0.30
0.096
32.6
S2-(aq)
41.8
83.7
22
HS-(aq)
-17.7
12.6
61.1
H2S(g)
-20.2
-33
205.6
H2S(aq)
-39
-27.4
122
SO2(g)
-296.8
-300.2
248.1
SO3(g)
-396
-371
256.66
SO42-(aq)
-907.51
-741.99
17
HSO4-(aq)
-885.75
-752.87
126.9
H2SO4(l)
-813.989
-690.059
156.90
H2SO4(aq)
-907.51
-741.99
17

Group VIIA

For one mole at 298K and 1 atmosphere pressure
Substance (form)
Enthalpy
DfH (kJ)
Gibbs
DfG (kJ)
Entropy
(J/ K
F(g)
78.9
61.8
158.64
F-(g)
-255.6
-262.5
145.47
F-(aq)
-329.1
-276.5
-9.6
F2(g)
0
0
202.7
HF(g)
-273
-275
173.67
Cl(g)
121.0
105.0
165.1
Cl-(g)
-234
-240
153.25
Cl-(aq)
-167.46
-131.17
55.10
Cl2(g)
0
0
223.0
HCl(g)
-92.31
-95.30
186.79
HCl(aq)
-167.46
-131.17
53.06
Br(g)
111.9
82.40
174.90
Br-(g)
-218.9
...
...
Br-(aq)
-120.9
-102.82
80.71
Br2(g)
30.91
3.13
245.38
Br2(l)
0
0
152.23
HBr(g)
-36
-53.5
198.59
I(g)
106.8
70.21
180.67
I-(g)
-194.7
...
...
I-(aq)
-55.94
-51.67
109.4
I2(g)
62.442
19.38
260.58
I2(s)
0
0
116.14
HI(g)
25.9
1.3
206.33


Most of data from Ebbing, Darrell D., General Chemistry, 3rd Ed., Appendix C, Houghton-Mifflin, 1990.


Thermodynamic potentialsSpecific Heat
 Index

Tables

Reference
Ebbing
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