Konstanta Antoine PDF [PDF]

Citation preview

VAPOUR PRESSURE FOR LIQUID-VAPOUR EQUILIBRIUM Antoine's equation fitting (T in kelvin and p in kPa)



Substance



Formula Acetylene C2H2 Acetone C3H6O Ammonia NH3 Argon Ar Benzene C6H6 n-Butane C4H10 Carbon dioxide CO2 Carbon monoxide CO Carbon tetrachloride CCl4 Chloroform CHCl3 Cyclohexane C6H12 n-Decane C10H22 n-Dodecane C12H26 Ethane C2H6 Ethanol C2H6O Ether C4H10O Ethyl acetate C4H8O2 Ethylene C2H4 Ethylenglicol C2H6O2 4 Helium ( He) He n-Heptane C7H16 n-Hexadecane C16H34 n-Hexane C6H14 Hydrazine N2H4 Hydrogen H2 Methane CH4 Methanol CH4O Neon Ne Nitrogen N2 * Nitrogen dioxide NO2 * di-Nitrogen tetroxide N2O4 Nitrogen monoxide. NO n-Octane C8H18 iso-Octane (2-2-4 trimethyl pentane) C8H18 Oxygen O2



A 14.83 14.71 15.49 13.91 14.16 13.98 15.38 13.87 14.62 14.50 13.79 13.99 14.06 13.88 16.19 14.17 14.32 13.82 16.18 10.56 13.90 14.20 13.83 15.30 12.78 13.58 16.49 13.47 13.45 21.98 21.98 14.24 14.24 13.67 13.68



B 1837 2976 2363 833 2949 2292 1956 770 3394 2939 2795 3452 3744 1582 3424 2564 2868 1427 4494 37 2933 4240 2714 3500 232 968 3593 265 658 6615 6615 1548 3304 2896 780



C -8.45 -34.52 -22.62 2.36 -44.56 -27.86 -2.11 1.64 -10.22 -37.00 -49.11 -78.90 -92.83 -13.76 -55.72 -39.37 -55.00 -14.31 -82.10 2.0 -55.64 -117 -47.80 -59.50 8.08 -3.72 -35.22 2.83 -2.85 86.88 86.88 -23.91 -55.23 -52.4 -4.18



n-Pentane C5H12 13.98 2555 -36.25 Propane C3H8 13.71 1873 -25.10 iso-Propanol C3H8O2 15.78 983 -75.70 Propylene C3H6 13.88 1875 -22.91 R12 CCl2F2 13.79 1971 -28.30 R134a CF3CH2F 14.41 2094 -33.06 ** R410A n.a. 14.97 2118 -17.27 Sulfur dioxide SO2 14.94 2385 -32.21 Sulfur hexafluoride SF6 12.53 1045 -75.64 Water H2O 16.54 3985 -39.00 Xenon Xe 13.62 1340 -19.00 * There are mixture of dinitrogen tetroxide (N2O4) and nitrogen dioxide (NO2).The NO2/N2O4 equilibrium depends on temperature, NO2 being favoured at high temperatures and N2O4 at low temperatures. When condensing, at 11.3 ºC at 100 kPa, most of the liquid is N2O4 which is colourless or pale brownish, ** R410A is a near-azeotropic mixture of R32 (difluoromethane, CH2F2) and R125 (pentafluoroethane, CHF2CF3), 50/50 by weight (70/30 molar), which can be approximated as a pure substance. Back