The standard electrode potential for daniel cell is 1.1 v calculate the standard gibbs energy for the reaction zn + 2 + is equals to z into plus
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1
Answer:
we have Zn(s) + Cu2+(aq)------- Zn2+(aq) + Cu(s)
gibbs free enrgy =-n FE
where n is the number of electron=2
F is the faradays constant,here it is 96500C
E is the EMF of the cell =1.1V
Gibbs free energy=-2*96500*1.1 J
= -212.3 KJ
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The definitions of electrical units that were proposed at the 1881 International Conference of Electricians were designed so that the electromotive force of the Daniell cell would be about 1.0 volts. With contemporary definitions, the standard potential of the Daniell cell at 25 °C is actually 1.10 V.
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