Question

Consider the cell notation Cd(s) | Cd(NO3)2(aq) || AgNO3(aq) | Ag(s) with standard reduction potentials for Cd2+ and Ag+ as -0.402V and 0.799V respectively. What conclusions would you make for the reaction after determining the Gibbs free energy (△G)

Answer 1

The value of the Gibbs free energy shows us that the reaction is spontaneous.

What is the Gibbs free energy?

The Gibbs free energy is a quantity that helps us to be able to determine the spontaneity of a reaction.

In order to obtain the Gibbs free energy, we must obtain the Ecell as follows; 0.799V - (-0.402V) = 1.201 V

Now;

△G = -nFEcell

△G = -(2 * 96500 * 1.201)

△G = -232kJ/mol

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