162 TABLE 154.— SPECIFIC HEAT OF LIQUID AMMONIA UNDER 

 SATURATION CONDITIONS 



Expressed in calories 2 o per gram per degree C 



TABLE 155.— HEAT CONTENT OF SATURATED LIQUID AMMONIA 



Heat content = H = e + pv, where e is the internal or intrinsic energy. 



Temperature °C... — 50° — 40° 

 H = e + p v —53.8 —43.3 



-30° 

 -32.6 



-20° 

 -21.8 



-10° 0° +10° +20° +30° +40° +50° 

 -11.0 0.0 +11.1 +22.4 -33.9 -45.5 -57.4 



TABLE 156.— SPECIFIC HEAT OF MINERALS AND ROCKS 



Tempera- 

 Substance ture °C 



Andalusite 0-100 



Anhydrite, CaS0 4 0-100 



Apatite 15-99 



Asbestos 20-98 



Ausite 20-98 



Barite, BaSO, 10-98 



Beryl 15-99 



Borax, Na 2 B,0 7 fused... 16-98 



Calcite, CaC0 3 0-50 



0-100 

 0-300 



.Cassiterite Sn0 2 16-98 



Chalcopyrite 15-99 



Corundum 9-98 



Cryolite, Al 2 F„-6NaF ... 16-99 



Fluorite, CaF 2 15-99 



Galena, PbS 0-100 



Garnet 16-100 



Hematite, Fe 2 3 15-99 



Hornblende 20-98 



Hypersthene 20-98 



Labradorite 20-98 



Magnetite 18-45 



Malachite, Cu.CChH.O .. 15-99 



Mica (Mg) 20-98 



(K) 20-98 



Oligoclase 20-98 



Orthoclase 15-99 



Pvrolusite, Mn0 2 17-48 



Quartz, Si0 2 12-100 





 350 

 400-1200 



50 Nat. Bur. Standards Journ. Res., vol. 38, p. 593, 1947. 



SMITHSONIAN PHYSICAL TABLES 



