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Sagot :
A positive sum of the two half-reactions' standard potentials is a property characterizes a spontaneous redox reaction. Hence, option C is correct.
What is spontaneous redox reaction?
Spontaneous reactions are reactions in which no external force is applied to proceed with the reaction.
A spontaneous redox reaction maybe a sort of reaction during which there usually the discharge of energy where the electrons are transferred from anode to cathode and this is also known as the electrochemical cells equation the reactions result in the generation of electricity.
Redox reactions are reactions in which loss or gain of electrons occur between an atom.
In other words redox reaction between Zn and Cu²⁺ is spontaneous this is due to the difference in potential energy between these two substance.
A positive sum of the two half-reactions' standard potentials is a property characterizes a spontaneous redox reaction. Hence, option C is correct.
Learn more about spontaneous redox reaction, Here:
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