+----------------------+--------------------------------+
| MARKS AND DAVIS | PEABODY |
| From Values of | From Values of |
| Barnes and Dieterici | Barnes and Regnault |
+-----------+----------+---------------------+----------+
|Temperature| Specific | Temperature | Specific |
+-----------+ Heat +----------+----------+ Heat |
| Degrees | | Degrees | Degrees | |
|Fahrenheit | |Centigrade|Fahrenheit| |
+-----------+----------+----------+----------+----------+
| 30 | 1.0098 | 0 | 32 | 1.0094 |
| 40 | 1.0045 | 5 | 41 | 1.0053 |
| 50 | 1.0012 | 10 | 50 | 1.0023 |
| 55 | 1.0000 | 15 | 59 | 1.0003 |
| 60 | 0.9990 | 16.11 | 61 | 1.0000 |
| 70 | 0.9977 | 20 | 68 | 0.9990 |
| 80 | 0.9970 | 25 | 77 | 0.9981 |
| 90 | 0.9967 | 30 | 86 | 0.9976 |
| 100 | 0.9967 | 35 | 95 | 0.9974 |
| 110 | 0.9970 | 40 | 104 | 0.9974 |
| 120 | 0.9974 | 45 | 113 | 0.9976 |
| 130 | 0.9979 | 50 | 122 | 0.9980 |
| 140 | 0.9986 | 55 | 131 | 0.9985 |
| 150 | 0.9994 | 60 | 140 | 0.9994 |
| 160 | 1.0002 | 65 | 149 | 1.0004 |
| 170 | 1.0010 | 70 | 158 | 1.0015 |
| 180 | 1.0019 | 75 | 167 | 1.0028 |
| 190 | 1.0029 | 80 | 176 | 1.0042 |
| 200 | 1.0039 | 85 | 185 | 1.0056 |
| 210 | 1.0052 | 90 | 194 | 1.0071 |
| 220 | 1.007 | 95 | 203 | 1.0086 |
| 230 | 1.009 | 100 | 212 | 1.0101 |
+-----------+----------+----------+----------+----------+
In consequence of this variation in specific heat, the variation in the
heat of the liquid of the water at different temperatures is not a
constant. Table 22[13] gives the heat of the liquid in a pound of water
at temperatures ranging from 32 to 340 degrees Fahrenheit.
The specific heat of ice at 32 degrees is 0.463. The specific heat of
saturated steam (ice and saturated steam representing the other forms in
which water may exist), is something that is difficult to define in any
way which will not be misleading. When no liquid is present the specific
heat of saturated steam is negative.[14] The use of the value of the
specific heat of steam is practically limited to instances where
superheat is present, and the specific heat of superheated steam is
covered later in the book.