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The cell potential (E_("cell")) of a reaction is related as DeltaG = -nFE_("cell") , where DeltaG represents max. useful electrical work . n=no. of molesof electrons exchanged during the reactino of reversiblecell reaction d(DeltaG) = (DeltaV)dP-(DeltaS).dT at constant pressured(DeltaG) = - (DeltaS).dT :' At constant pressure DeltaG = DeltaG = DeltaH-TDeltaS.......(1) :. DeltaG = DeltaH + T((d(DeltaG))/(dT))_P ......... (B) ((dE_("cell"))/(dT))_(P) is known as temperature coefficient of the e.m.f of the cell When DeltaS increases, temperature coefficient of the emf of cell |
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Answer» Constant ` IMPLIES -DeltaS = ((d(DeltaG))/(dT))_P - DeltaS = ((d(-nFE_("cell")^(0)))/(dt))_(P)- DeltaS = -NF((dE_("cell"))/(dt))_(P)` `((dE_("cell"))/(dt))_P = (DeltaS)/(nF) implies If DeltaS uarr ` then `((dE_("cell"))/(dt))_(P)uarr` |
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