Abstract
A small calorimeter for massic heat capacitycvmeasurements in the critical region of fluids was developed. Its main part is a horizontal capillary tube. The influence of gravity is reduced, and the distance for the transfer of heat into the fluid is shortened with the small diameter of the tube. The calibration of the calorimeter, the experimental procedure, and the evaluation of the results are described. The influence of vertical and radial profiles of temperature and density and the experimental uncertainty are discussed. Results forcvof CO2at nearly critical density are shown.
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