Heat Capacity Standards for the Range 14 to 1200°K.

Abstract

In An Effort To Supply Accurate Heat Capacity Data On Pure Materials Which Will Serve As Standards In Precision Calorimetry, There Axe Given The Results of New Heat Capacity Measurements At The National Bureau of Standards On Nheptane (25 6 To 523°K.) And On Aluminum Oxide (Corundum), (14 To 1173°K.). These Materials Together With Benzoic Acid Had Been Recommended By The Calorimetry Conference (U. S.) As Standards For The Intercomparison of Calorimeters. Diphenyl Ether Is Suggested As An Additional Standard To Supplement The Above Three Substances And Water Which Is Universally Used As A Standard. Tables of Smoothed Values of Heat Capacity And Enthalpy Are Given For Nheptane, Aluminum Oxide, Benzoic Acid (Up To 430° K.), Diphenyl Ether (Up To 570°K.) And Water (0 To 100°C.). © 1953, American Chemical Society. All rights reserved.