Table 7. Observed heat capacities of potassium pentaborate tetrahydrate (KB5O8·4H2O).
Gram molecular weight=293.214 g, T deg K=t deg C + 273.15
| Run No. | Ta | CPb |
|---|---|---|
| °K | J deg−1 mole−1 | |
| 1 | c 82.3034 | 124.47 |
| 84.5045 | 127.41 | |
| 87.2906 | 130.73 | |
| 90.4015 | 134.47 | |
| 94.2352 | 138.65 | |
| 97.7969 | 142.38 | |
| 100.8126 | 145.88 | |
| 104.4460 | 149.72 | |
| 109.2458 | 154.79 | |
| 114.4401 | 160.14 | |
| 119.4561 | 165.24 | |
| 124.3238 | 169.94 | |
| 2 | ||
| 122.5274 | 168.51 | |
| 126.7802 | 172.44 | |
| 132.0640 | 177.73 | |
| 137.7528 | 183.65 | |
| 143.2724 | 189.10 | |
| 148.7043 | 194.28 | |
| 154.0496 | 199.69 | |
| 159.4711 | 205.37 | |
| 165.1884 | 210.55 | |
| 171.1866 | 215.30 | |
| 177.2576 | 222.28 | |
| 183.3799 | 227.74 | |
| 189.7612 | 233.17 | |
| 196.3811 | 239.71 | |
| 203.0422 | 245.48 | |
| 209.5620 | 251.83 | |
| 215.9440 | 258.02 | |
| 3 | ||
| 17.6472 | 11.985 | |
| 19.7382 | 15.512 | |
| 22.2888 | 20.078 | |
| 25.1550 | 25.547 | |
| 27.8585 | 30.962 | |
| 30.2911 | 35.903 | |
| 32.7529 | 41.031 | |
| 35.3106 | 46.382 | |
| 37.6918 | 51.289 | |
| 40.0046 | 56.023 | |
| 42.2754 | 60.535 | |
| 44.8340 | 65.552 | |
| 47.8084 | 71.345 | |
| 50.9450 | 77.261 | |
| 54.4675 | 83.506 | |
| 58.0818 | 89.653 | |
| 61.7500 | 95.681 | |
| 65.5484 | 101.56 | |
| 4 | ||
| 57.0740 | 87.903 | |
| 60.5248 | 93.626 | |
| 64.0627 | 99.322 | |
| 67.7316 | 104.69 | |
| 71.2346 | 109.58 | |
| 75.3972 | 115.25 | |
| 80.1645 | 121.60 | |
| 84.6696 | 127.49 | |
| 88.9634 | 132.78 | |
| 5 | ||
| 197.9566 | 240.80 | |
| 205.1094 | 247.60 | |
| 212.5784 | 254.49 | |
| 220.3804 | 261.68 | |
| 228.0024 | 268.67 | |
| 235.4532 | 275.46 | |
| 242.7348 | 282.04 | |
| 249.6717 | 288.22 | |
| 257.3066 | 295.06 | |
| 265.1866 | 302.01 | |
| 273.2946 | 309.20 | |
| 281.2286 | 315.99 | |
| 289.0028 | 323.08 | |
| 296.6320 | 329.04 | |
| 305.3462 | 336.59 | |
| 315.1084 | 344.83 | |
| 324.6656 | 352.76 | |
| 6 | ||
| 333.5876 | 360.24 | |
| 342.4691 | 367.37 | |
| 351.1885 | 374.38 | |
| 359.7526 | 381.26 | |
| 368.1638 | 388.43 |
a
T is the mean temperature of the heating interval.
b
CP is the observed mean heat capacity over the interval.
c
The temperatures given are believed to be accurate to 0.01 °K. The figures beyond the second decimal are significant only insofar as small temperature differences are concerned.