Question

The standard cell potential for the reaction 2 NO + ½ O2 + H2O → 2...

The standard cell potential for the reaction
2 NO + ½ O2 + H2O → 2 HNO2
was measured to be +0.240 V. Calculate the standard reaction Gibbs energy

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Homework Answers

Answer #1

+2                                  +3

2 NO + ½ O2 + H2O → 2 HNO2 ; Eocell = +0.240 V

We know that G = - nFEocell

Where

n = number of electrons transferred = change in oxidation state = +3-(+2) = 1

F = Faraday = 96500 C

Plug the values we get

G = - nFEocell

       = -1x96500x0.240

       = - 23.16x103 J

       = -23.16 kJ

Therefore the standard reaction Gibbs energy is -23.16 kJ

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