170 TABLE 166.— PROPERTIES OF SATURATED STEAM (continued) 



Metric and common units, 0° to 220°C 



If A is the reciprocal of the mechanical equivalent of heat, p the pressure, s and a the 

 specific volumes of the liquid and the saturated vapor, s — a, the change of volume, then 

 the heat equivalent of the external work is Apu = Apis — a). Heat equivalent of internal 

 work, p = r — Apu, Entropy = $dQ/T, where dQ — amount of heat added at absolute 

 temperature T. 



Heat equiva 



SMITHSONIAN PHYSICAL TABLES 



