Periodic table shop Printable periodic table

Thermodynamic properties

A definition will appear here.

Units

None

Notes

The values of ΔHf8 and ΔGf8 represent the changes in H or G when one mole of the element is formed in the defined state isothermally from the elements in its appropriate standard state. The standard state is chosen to be the state that is thermodynamically stable at 258C and 1 atmosphere pressure. The standard state is shown as those for which ΔHf and ΔGf are precisely zero.

The values of S8 represent the virtual of thermal "entropy" of the element in the standard state at 298.15 K, omitting contributions from nuclear spins and isotope mixing effects.

The heat capacity, Cp8, is the quantity of heat required to increase the temperature by 1 K of one mole of the element in the defined state. The units are J K-1 mol-1. This quantity is dependent upon temperature in a complex fashion. See Ref. 2 for further details.

Literature sources

  1. G.W.C. Kaye and T.H. Laby in Tables of physical and chemical constants, Longman, London, UK, 15th edition, 1993.
  2. D.R. Lide, (Ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 79th edition, 1998.
  3. A.M. James and M.P. Lord in Macmillan's Chemical and Physical Data, Macmillan, London, UK, 1992.
Explore the element of your choice through this periodic table.
1 2   3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
S
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
*
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
**
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
 
*Lanthanoids *
57
58
59
60
61
62
63
64
65
66
67
68
69
70
**Actinoids **
89
90
91
92
93
94
95
96
97
98
99
100
101
102