Heat capacity of gaseous carbon dioxide

Abstract

The heat capacity (Cv) of gaseo us carbon d ioxide has been measured at -30, 0, + 50, and + 90 C and at 0.5-, 1.0-, and lo5-atmosphere pressure, with an accuracy of 0.1 percent. The flow calorimeter used was a modification of the one previously described by Scott and In order to test the accuracy of t he calorimeter, the heat capacity of oxygen was measured at 1 atm osphere at -30, 0, and + 50C. Thc measured values of Cv for oxygen were combined with an equation of sta te to gi ve C;; these differed from the statistically calculated values by + 0.03, -0.06 and -0.01 per cent at the three temperatures.