Experimental thermal conductivities of the N2O4 is in equilibrium to 2NO2 system

Kenneth P. Coffin, Cleveland O'Neal, Jr.
naca-tn-4209
Feb 1958


The thermal conductivity of reacting gas systems has been treated theoretically by various investigators; but reliable, direct measurements of the thermal conductivity of reacting systems for which satisfactory calculations can be made are not available. This investigation was designed to supply the needed data. The thermal conductivity of the N2O4 not equal to 2NO2 system was measured by a hot-wire technique at temperatures between 20 degrees and 215 degrees C and pressures from 1/3 to 1 atmosphere; approximate values were obtained at pressures as low as 0.02 atmosphere from 20 degrees to 80 degrees C. The experimental values for the equilibrium system were found to be as much as nine times those computed for the equivalent nonreacting system. Excellent agreement was obtained between the experimental values for the equilibrium thermal conductivity of the N2O4 not equal to 2NO2 system and the calculated values. Minor discrepancies did occur, and explanations for these are suggested.

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