✍ Scribed by Franciszek Łetowski; Gerard Pinard-Legry
No coin nor oath required. For personal study only.
Standard lead-lead suiphate electrode potential was determined over the temperature range 26240°C from enrfm~%suremcnts of the Pb, PbS04-H2S04 (O.O5M)-&SO,-KCI-HCi(O.iM)/AgCl, Ag and Pb, PbS04-H~SO~(m)-KsS04-HsS04(0.05M)-PbSO~, Pb cells where m = 0.005, 0.01, 0.1 and 0.5 M. To this &ect iea&leadsulphateeiectrode potential was calculated using the temperature relationship of the standard silversilver chloride eisctrode potential and activity coefficients of hydrochloric acid determined by Greeley ei' al. at temperatures up to 260°C. Diffusion potentials occurring at the phase boundaries in the cells under investigation were calculated using the Henderson's equation. Values of the standard lead-lead sulphate electrode potential were determined by extrapolation of the E"' function to the zero ionicstrength which was calculated using thesecond suiphuric acid dissociation whstant dotermined by Lietzke etnl. at temperatures up to 300°C. The standard electrode potential was described in the temperature range 20-240°C by the following relationship: EOw.Pbso,/so.:-(V) = 0.040-0.001263. A change in entropy AS" of the electrode reaction Pb + SOi-= PbSO+ + 2e-IS constant in this temperature range and is -243JK-'mol-,' (-1018ca1K-'mo1-').
📜 SIMILAR VOLUMES