THERMAL and CHEMICAL EFFECTS OF CURRENT

THERMAL & CHEMICAL EFFECTS OF CURRENT Joule's laws of heating effect Electrical energy Heat - produced H =  Electric power  P == Vi = i2R = watt. Resistances in series or  Ps = , (Rs = R1 + R2 + ........) Resistances in Parallel : P1R1 = P2R2 or H1R1 = H2R2. Thermocouple Seeback effect Thermo emf e = at +bt2 Temperature inversion TL - Tn = Tn - Tc Tn =  Thermo-electric power (Seebeck coefficient) P = (at + bt2) = a + 2bt = s Thomson Coefficient   =  Relations between S, p and s  = T. and  = -T  = T(S) Total emf E =  Thomson emf E =  Faraday's laws of Electrolysis  1. m = zq = zit 2. = constant Relation between chemical equivalent and electrochemical equivalent Faraday constant