Final answer:
To determine if a reaction is spontaneous, we look at the sign of the electrode potential. A positive Eθ indicates a spontaneous reaction, while a negative Eθ indicates a non-spontaneous reaction.
Step-by-step explanation:
Eθ is the standard electrode potential of a redox reaction. To determine whether a reaction is spontaneous, we look at the sign of the electrode potential. If Eθ is positive, then the reaction is spontaneous as written. If Eθ is negative, the reaction is not spontaneous and will only proceed in the reverse direction. For example, if Eθ = 0.62 V, the reaction is spontaneous.