Ag(s) 0 43 Ag(l) 11 51.9 Ag_2O(s) -31 121 Al(s) 0 28.33 Al(l) 10.56 39.55 Al_2O_3(s) -1675.7 50.92 Au(s) 0 47.4 Au(l) 12.55 56.76 C(s) 0 5.74 CH_4(g) -74.81 186.26 C_2H_6(g) -84.68 229.6 CH_3OH(l) -238.66 126.8 CH_3OH(g) -200.66 239.81 C_2H_5OH(l) -277.69 160.7 C_2H_5OH(g) -235.1 282.7 CH_3COOH(l) -484.5 159.8 CH_3COOH(aq) -485.76 178.7 CH_3COO^-(aq) -486.01 86.6 Cl_2(g) 0 223.07 Cl^-(aq) -167.16 56.5 CO(g) -110.53 197.67 CO_2(g) -393.51 213.74 Cu(s) 0 33.15 Cu(l) 13.26 42.92 Cu^{2+}(aq) 64.77 -99.6 Cr(s) 0 24 Cr_2O_3(s) -1140 81 CuO(s) -157 43 CuO(l) -145 50.5 Fe(s) 0 27.28 Fe(l) 13.76 34.9 FeO(s) -272 61 FeO(l) -248 75.7 Fe_3O_4(s) -1118.4 146.4 Fe_3O_4(l) -980.4 220.3 Fe_2O_3(s) -824 87 H_2(g) 0 131 H^+(aq) 0 0 HCl(aq) -167.16 56.5 H_2O(l) -285.83 69.91 H_2O(g) -241.82 188.83 H_2O_2(l) -187.78 109.6 H_2SO_4(l) -813.99 156.9 H_2SO_4(aq) -909.27 20.1 Mg(s) 0 33 Mg(l) 8.4 42.1 Mg(g) 147 142.3 MgO(s) -602 27 Mn(s) 0 32 Mn(l) 15 41.9 MnO(s) -385 60 N_2(g) 0 193 NO(g) 90.25 210.76 NO_2(g) 33.18 240.06 N_2O_4(g) 9.16 304.29 NH_3(g) -46.11 192.45 NH_3(aq) -80.29 111.3 NH_4^+(aq) -132.51 113.4 Na(s) 0 51.21 Na^+(aq) -240.12 59 NaCl(s) -411.15 72.13 O_2(g) 0 205.138 O_3(g) 142.7 238.93 OH^-(aq) -229.99 -10.75 Pb(s) 0 64.81 Pb(l) 4.77 72.76 PbO(s) -217.32 68.7 S_2(g) 128.37 228.18 SO_2(g) -296.83 248.22 SO_3(g) -395.72 256.76 SO_4^{2-}(aq) -909.27 20.1 Si(s) 0 18.83 Si(l) 50.21 48.6 SiO_2(s) -910.94 41.84 Zn(s) 0 41.63 Zn(l) 6.7 51.3 Zn(g) 121.5 148.6 ZnO(s) -348.28 43.64