Skip to main content
. 1964 Aug 1;68A(4):381–389. doi: 10.6028/jres.068A.037

Table 10. Molal thermal functions for sodium pentaborate pentahydrate (NAB5O8·5H2O).

Gram molecular weight=295.117 g, T deg K=t deg C + 273.15

T CP (HTH0C) (HTH0C)T ST (GTH0C) (GTH0C)T







°K J/deg J J/deg J/deg J J/deg
0.00 0.000 0.000 0.000 0.000 0.000 0.000
5.00 .303 .378 .076 .101 .126 .025
10.00 2.412 6.046 .605 .806 2.017 .202
15.00 7.658 29.873 1.992 2.667 10.136 .676
20.00 15.102 86.499 4.325 5.874 30.976 1.549
25.00 23.425 182.40 7.296 10.119 70.581 2.823
30.00 32.552 322.21 10.740 15.192 133.55 4.452
35.00 42.084 508.60 14.531 20.920 223.59 6.388
40.00 51.526 742.67 18.567 27.157 343.60 8.590
45.00 60.857 1023.7 22.749 33.766 495.77 11.017
50.00 70.088 1351.2 27.023 40.658 681.73 13.635
55.00 78.950 1723.8 31.342 47.755 902.69 16.413
60.00 87.643 2140.4 35.673 54.998 1159.5 19.325
65.00 96.143 2600.0 40.000 62.352 1452.9 22.352
70.00 104.00 3100.6 44.294 69.767 1783.1 25.473
75.00 111.63 3639.7 48.529 77.203 2150.6 28.674
80.00 119.24 4216.9 52.711 84.651 2555.2 31.940
85.00 126.87 4832.3 56.850 92.110 2997.1 35.260
90.00 133.89 5484.4 60.938 99.563 3476.3 38.625
95.00 140.41 6170.3 64.950 106.98 3992.7 42.028
100.00 146.88 6888.5 68.885 114.35 4546.0 45.460
105.00 153.30 7639.0 72.752 121.67 5136.0 48.915
110.00 159.64 8421.3 76.558 128.94 5762.6 52.387
115.00 165.94 9235.3 80.307 136.18 6425.4 55.873
120.00 172.11 10080 84.004 143.37 7124.3 59.369
125.00 178.23 10956 87.651 150.52 7859.1 62.873
130.00 184.30 11863 91.252 157.63 8629.5 66.381
135.00 190.29 12799 94.809 164.70 9435.3 69.891
140.00 196.23 13766 98.326 171.73 10276 73.403
145.00 202.11 14761 101.80 178.72 11153 76.914
150.00 207.96 15787 105.24 185.67 12064 80.424
155.00 213.76 16841 108.65 192.58 13009 83.930
160.00 219.51 17924 112.03 199.46 13989 87.433
165.00 225.18 19036 115.37 206.30 15004 90.932
170.00 230.83 20176 118.68 213.11 16052 94.425
175.00 236.48 21344 121.97 219.88 17135 97.913
180.00 242.12 22541 125.23 226.62 18251 101.39
185.00 247.74 23765 128.46 233.33 19401 104.87
190.00 253.56 25018 131.68 240.01 20594 108.34
195.00 259.78 26302 134.88 246.68 21801 111.80
200.00 266.07 27616 138.08 253.34 23051 115.26
205.00 272.33 28962 141.28 259.98 24334 118.70
210.00 278.15 30339 144.47 266.62 25651 122.15
215.00 283.81 31744 147.65 273.23 27000 125.58
220.00 289.39 33177 150.80 279.82 28383 129.01
225.00 294.98 34638 153.95 286.38 29799 132.44
230.00 300.53 36126 157.07 292.93 31247 135.86
235.00 306.06 37643 160.18 299.45 32728 139.27
240.00 311.56 39187 163.28 305.95 34241 142.67
245.00 317.03 40759 166.36 312.43 35787 146.07
250.00 322.48 42357 169.43 318.89 37366 149.46
255.00 327.90 43983 172.48 325.33 38976 152.85
260.00 333.30 45636 17552 331.75 40619 156.23
265.00 338.66 47316 178.55 338.15 42294 159.60
270.00 344.01 49023 181.57 344.53 44000 162.96
273.15 347.36 50112 183.46 348.54 45092 165.08
275.00 349.33 50756 184.57 350.89 45739 166.32
280.00 354.62 52516 187.56 357.23 47509 169.68
285.00 359.87 54302 190.53 363.56 49311 173.02
290.00 365.14 56115 193.50 369.86 51145 176.36
295.00 370.28 57953 196.45 376.15 53010 179.69
298.15 373.55 59125 198.31 380.10 54201 181.79
300.00 375.47 59818 199.39 382.41 54906 183.02
305.00 380.68 61708 202.32 388.66 56834 186.34
310.00 385.91 63625 205.24 394.90 58793 189.65
315.00 391.17 65567 208.15 401.11 60783 192.96
320.00 396.50 67536 211.05 407.31 62804 196.26
325.00 401.96 69533 213.95 413.50 64856 199.56
330.00 407.52 71556 216.84 419.68 66939 202.85
335.00 413.24 73608 219.73 425.85 69053 206.13
340.00 419.05 75689 222.61 432.02 71197 209.40
345.00 424.75 77798 225.50 438.18 73373 212.68

H0C apply to the reference state of the solid at 0 °K.