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preface to fifteenth edition

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6.136 SECTION 6<br />

TABLE 6.4<br />

Heats of Fusion, Vaporization, and Sublimation and Specific Heat at Various Temperatures of<br />

the Elements and Inorganic Compounds (Continued)<br />

C p<br />

Substance Hm Hv Hs<br />

400 K 600 K 800 K 1000 K<br />

K 2 CO 3 27.6 128.1 150.7 170.0 189.0<br />

K 2 CrO 4 29.0<br />

K 2 Cr 2 O 7 36.7<br />

KF 27.2 141.8 231.8 51.0 54.3 57.4 61.2<br />

KH 44.1 51.9<br />

KHF 2 , Ht 11.22 196.7 6.62 86.1(c) 104.6(lq)<br />

KI 24.0 190.9 202.4 53.9 57.3 62.6(c) 72.4(lq)<br />

KNO 3 , Ht 5.10 128 10.1 108.4 120.5<br />

K 2 O, Ht 6.20 372 79.1 100.0 100.0 100.0<br />

KO 2 , Ht 0.302 79.7 83.9 90.2<br />

Ht 0.157 42.3<br />

K 2 O 2 107 121<br />

KOH, Ht 6.4 243 8.60 142.7 192 72.5 79.0(c) 83.0(lq) 83.0<br />

KPO 3 8.8<br />

K 3 PO 4 37.2<br />

K 2 P 2 O 7 58.6<br />

KReO 4 85.4<br />

K 2 S 16.15 77.3 82.5 87.7<br />

K 2 SiO 3 50 135.6 157.7 170.7 179.1<br />

K 2 SO 4 , Ht 8.45 584 34.39 147.6 172.5 199.6 226.1<br />

K 2 WO 4 19.5<br />

K 2 ZrCl 6 23.0<br />

Praseodymium<br />

Pr 6.89 331 356<br />

Promethium<br />

Pm 7.13 289 328<br />

Protactinium<br />

Pa 12.34 481<br />

PaCl 3 92.9 61.3<br />

Radium<br />

Ra 8.5 113<br />

Radon<br />

Rn3.247 18.10<br />

Rhenium<br />

Re 60.43 704 779 26.0 26.9 28.0 29.1<br />

ReF 5 58.1<br />

ReF 6 4.6 28.7<br />

ReF 7 7.5 38.3<br />

ReO 2 274.6<br />

ReO 3 21.8 208.4<br />

Re 2 O 7 64.2 74.1<br />

ReOCl 4 45.6<br />

ReOF 4 13.5 61.0<br />

ReOF 5 32.0 37.4<br />

Rhodium<br />

Rh 26.59 494 556 26.0 28.0 30.0 32.0<br />

Rh 2 O 3 109.9 121.4 133.0 144.5<br />

Rubidium<br />

Rb 2.19 75.77 31.7 30.9 30.7<br />

RbBr 15.5 154.8 52.8 54.9 57.1(c) 66.9(lq)

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