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An electrochemical cell has an Eocell of 2.00 V and transfers 1 mole of electrons. The Faraday constant is 96,485 C/mol e-. What is the value of delta G?

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Bunny Greenfelder
Bunny GreenfelderLv2
31 Dec 2019

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Related questions

For the following electrochemical cell: Cu(s)/Cu2+(aq, 0.0155 M)//Ag+(aq, 2.50 M)/Ag(s)

write the net cell equation. Phases are optional. Do not include the concentrations. Calculate the following values at 25.0 degrees C using standard potentials as needed: Eknot cell (V), Delta Gknot reaction (kJ/mol), E cell (V), Delta G reaction (kJ/mol).

Ok so this is a question on my sapling homework and I entered:

Cu + 2Ag+ -> Cu2+ +2Ag (correct)

Eknot cell = Eknot red + Eknot ox: (0.80) + (-0.34) = 0.46 V (correct)

*Delta Gknot rxn = nFEknotcell: -2(96,485)(0.46) = -88766.2 J = -8877 kJ/mol (incorrect)

Delta G rxn = Delta Gknot rxn + RTln(Q): -88.77 + (8.3145 x 10-3)(298)[ln(0.155/(2.50)2)] = -103.69 kJ/mol (correct)

*E cell = (-Delta G rxn)/(nF): (-103.690)/[(2)(96485)] = 0.54 V or 0.5 V (incorrect)

10) For a reaction in a galvanic cell both delta Ho and delta So are positive. Which of the following is true?

a) Eocell will increase with an increase in temperatue

b) Eocell will decrease with an decrease in temperature

c) Eocell will not change when the temperature increases

d) delta Go > 0 for all teperatures

e) None of the above statements is true

I need help calculating some problems dealing with Avogadro'sNumber and Faraday's Constant. Here is what I have so far:
Initial mass of copper anode: 35.00 g
Initial mass of copper cathode: 34.85 g
Time of electrolysis: 15 Min.
Current: 12V
Final mass of copper anode: 34.95g
Final mass of copper cathode: 34.79g

What I need:
Mass of copper oxidized at anode (g):
Moles of copper oxidized (mol):
Moles of electrons transferred (mol e-):
Coulombs passed through cell (C):
Electrons passed through cell (e-):
Avogadro's number (e-/mol e-):
Average value of Avogodro's number:
Percent Error:
Faraday constant (C/mol e-):
Average Faraday constant (C/mol e-):
Literature value of Faraday constant:
Percent error:

I have about 20 of these to do but I'll be ok if I can see howthey're calculated. Thanks for your help.

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