¡Descarga Tablas termodinamicas y más Guías, Proyectos, Investigaciones en PDF de Termodinámica solo en Docsity! Appendix A SELECTED THERMODYNAMIC AND THERMOCHEMICAL DATA TABLE A-1: THE STANDARD GIBBS FREE ENERGY CHANGES FOR SEVERAL REACTIONS This table lists the standard Gibbs free energy changes for selected reactions in the form AG3=A + BT] or AG7=A+BTINT+CTJ and lists the range of temperature in which the expression is valid. Example—For the oxidation of solid copper to form solid cuprous oxide according to 2Cu4, + ZO = CULO. AG” = —162,200 + 69.24TJ in the range 298-1356 K. Thus, at the melting temperature of Cu, 1356 K, AG Tse x = —162,200 +69.24 X 1356 = —68,310 3 Table A-1 The standard Gibbs free energy changes for several reactions (standard states are noted by subscript) Reaction AG, joules Range, K 2Ag 120, 7A8,0 (5) —30,540+66.11 T 298-463 Al TAI la tt in Fo) -—43,100-32.26 T 2Al je 5077 ALOs, 5) —1,687,200+326.8 T 993-2327 E 6) y "1/20, yo e —111,700-87.65 T 298-2000 E 82000 Cc (592, y Oz) 394, 1000.84 T 29 Appendices A: Selected Thermodynamic and Thermochemical Data 703. E Ce AS e) Cc e, y E Cin la ms in Fo) Ca0 6 y CO, ey “aCO, 0) 2Ca0 e () SiO, y 2C20'SiO, ) Co0,, (+50, (ej 2080 yy, 201, La SO yg" CEzOs, 6 2Cu,, +20, gg O, 5) 2Cu ¡H20, ag] 00, 6) 2Cug, y HS, o OS, (5) 3Fe (q; Cgr)” Fe,C, (9) 3Fe, ye a e Cá) Fe de pj 120 y FeO ls) Fe 120, ¿"FeO, 7 3Fe 4 20 pg FezO, a) Fe y 125, y Fes ls) Eg *CL y 20, Eg Hg Hg 1207 HO q) Hg,,¡*1/20,"H8O Li y U2Br, pg LiBr, 7) Mggy+Cla po "MECL y, Mg ("120 ¡MgO (5) 2M80 qn MESiO 42) MgO¿+C Oz (g” MECO p5, M£0 ¿+ ALO, 3"MgO-ALO, y Ma gy*1/20,,,=Mn0 4, N, ogg 2NH, e —202,800-9.96 T -91,040+110.7 T 22,600-42.26 T —168,400+144 7 —118,800-11.30 7 -227,860+1653 T —1,110,100+247.3 T —162,200+69.24 T —188,300+88.48 T —131,800+30.79 T 29,040-28.03 T 11,234-11.00 T —263,700+64.35 T -256,000+53.68 T —1,102,200+307.4 7 —150,200+52.55 T —188,200-12.80 T —3370-17.65 T —247,500+55.85 T -152,200+207.2 T —333,900+42.09 T —603,200+121.43 7 —729,600+204 T —67,200+4.31 T —117,600+170 T -35,560-2.09 T —388,900+76.32 T -471,200+172 T 773-2000. 773-2000 449-1150 298-2400 298-1230 298-1793 298-1356 1356-1509 708-1356 298-1000 1000-1137 298-1644 1303-2000 298-1808 412-1179 298-2000 298-2000 298-2000 12892000 987-1368 1363-2200 298-2171 298-1000 298-1698 298-1517 298-2000 na UC 706 Appendices A: Selected Thermodynamic and Thermochemical Data Ceciamond) co CO, Cao) Ca) Cao CaTiO3 o Cr,0y Cu Fe, 18) ES Fey, ELO q) O), (9) 2Mg02-ALO,'5SiO, N, SIN, SiO, _quartz) Ti TO, (rtile) Aa) 2B) 912 23.41 44.14 25.37 4.36 49.62 127.49 24.43 119.37 22.64 37.12 24.47 418 30.00 29.96 626.34 27.87 70.54 43.89 22.09 75.19 21.97, 23.22 69.62 7448 1322 4.10 9.04 726 4125 4.51 5.69 9.87 9.30 6.28 617 3.45 10.71 4.18 9121 427 98.74 1.00 10.46 1.17 11.63 4.64 7.53 6.19 0.46 8.54 6.95 27.99 3.68 15.65 0.33 -1.67 —200.83 6.02 18.20 —14.06 298-1200 298-2500 298-2500 298-716 arar 716-1115 ] 298-1177 298-1530 2982 130(7,,) 298-1800 298-1356(T,,) 298-118/1664-1809 1187-1664 1809-1873 298-2500 298-3000 298-1 738(T,,) 298-2500 298-900 298-847 298-1155 298-1800 298-1136 1136-2128 298-1478 1478-2950 (T,,) Appendices A: Selected Thermodynamic and Thermochemical Data : a : TABLE A-3: THE STANDARD MOLAR HEATS OF FORMATION AND MOLAR ENTROPIES OF VARIOUS SUBSTANCES AT 298 K O SÓ Example—For the reaction 3 2Als) + Ox = AlzOgo Ay x = —1,675,7003 Table A-3 The standard molar heats of formation and molar entropies of various substances at 298 K Substance AH 3 Sie JK ALO, 1,675,700 Ba z = Ba0 dada 548,100 BaTiO, 1,653,100 Cegraphio) = Ciamond) : 1,900 a CH, —74,800 1863 - co 110,500 197.5 co, 393,500 213.7 Ca a 41.6 Cao 634,900 38.1 Cañio, 1,660,600 93.7 3Ca0-ALO, 3SiO, 6,646,300 2414 Ca0-ALO,SiO, 3,293,200 1448 Ca0-AL,O,25iO, - -—4223,700 202.5 2C40-AL,O,SiO, 3,989,400 1983 Cro, 1,134,700 812 ds 2329 50 241,800 N, - 191.5 o, . N 205.1 SiO» a-quarz) 910,900 415 SIN, : 744,800 113.0 = . - 307. 708 Appendices A: Selected Thermodynamic and Thermochemical Data TO 543,000 34.7 Ti,O, 1,521,000 711.2 TiO, 2,439,000 129.4 TiO, 944,000 50.6 Zr — : 39.0 ZrO, —1,100,800 50.4 which is thus the standard molar heat of formation of. ALO, at 298 K. The molar entropy of ALO, at 298 K is 50.9 J/K. By convention, the standard molar enthalpies of elements in their standard states at 298 K are assigned the value of zero. : TABLE A-4: THE SATURATED VAPOR PRESSURES OF VARIOUS “"SUBSTANCES The saturated (equilibrium) vapor pressures 'of fsabstances, in the stated ranges of temperatures, are presented in the form inp (mm) E + BinT+C Example—The saturated vapor pressure exerted by aa CaF, in the range of temperature 1691-2783 K is given by topan) » 220 2 — 4.5250 T + 53.96 Thus, at its normal boiling temperature of 2783 K, the saturated vapor pressure of liquid Car, is In p (atm) = “87 4.525 In 2783 + 53.96 =0 ¡.e., at the normal boiling temperature, the saturated vapor pressure is 1 atm.
