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The reaction is spontaneous if the cell potential is
- a)Positive
- b)Negative
- c)Zero
- d)Infinite
Correct answer is option 'A'. Can you explain this answer?
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Most Upvoted Answer
The reaction is spontaneous if the cell potential isa) ...
Explanation:
The spontaneity of a reaction can be determined by calculating the cell potential. The cell potential (Ecell) is the difference in the electric potential between two electrodes in a galvanic cell. A positive Ecell indicates that the reaction is spontaneous, while a negative Ecell indicates that the reaction is non-spontaneous.
Reasons why a positive Ecell indicates a spontaneous reaction:
1. Gibbs Free Energy (ΔG): The Gibbs free energy (ΔG) of a reaction is a measure of the energy available to do work. A negative ΔG indicates that the reaction is spontaneous, while a positive ΔG indicates that the reaction is non-spontaneous. The relationship between ΔG and Ecell is given by the equation: ΔG = -nFEcell, where n is the number of electrons transferred in the reaction and F is Faraday's constant. Since ΔG is negative for a spontaneous reaction, Ecell must be positive.
2. Thermodynamics: The second law of thermodynamics states that spontaneous processes are those that increase the entropy (disorder) of the system. In an electrochemical cell, the flow of electrons from the anode to the cathode results in an increase in entropy. This flow of electrons occurs spontaneously when Ecell is positive.
3. Electrostatics: The direction of electron flow in an electrochemical cell is determined by the difference in electric potential between the two electrodes. The electrons flow from the anode to the cathode because the cathode has a higher electric potential than the anode. This difference in electric potential results in a positive Ecell, indicating a spontaneous reaction.
In conclusion, a positive Ecell indicates that the reaction is spontaneous because it satisfies the conditions of thermodynamics, electrostatics and Gibbs free energy.
The spontaneity of a reaction can be determined by calculating the cell potential. The cell potential (Ecell) is the difference in the electric potential between two electrodes in a galvanic cell. A positive Ecell indicates that the reaction is spontaneous, while a negative Ecell indicates that the reaction is non-spontaneous.
Reasons why a positive Ecell indicates a spontaneous reaction:
1. Gibbs Free Energy (ΔG): The Gibbs free energy (ΔG) of a reaction is a measure of the energy available to do work. A negative ΔG indicates that the reaction is spontaneous, while a positive ΔG indicates that the reaction is non-spontaneous. The relationship between ΔG and Ecell is given by the equation: ΔG = -nFEcell, where n is the number of electrons transferred in the reaction and F is Faraday's constant. Since ΔG is negative for a spontaneous reaction, Ecell must be positive.
2. Thermodynamics: The second law of thermodynamics states that spontaneous processes are those that increase the entropy (disorder) of the system. In an electrochemical cell, the flow of electrons from the anode to the cathode results in an increase in entropy. This flow of electrons occurs spontaneously when Ecell is positive.
3. Electrostatics: The direction of electron flow in an electrochemical cell is determined by the difference in electric potential between the two electrodes. The electrons flow from the anode to the cathode because the cathode has a higher electric potential than the anode. This difference in electric potential results in a positive Ecell, indicating a spontaneous reaction.
In conclusion, a positive Ecell indicates that the reaction is spontaneous because it satisfies the conditions of thermodynamics, electrostatics and Gibbs free energy.
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Community Answer
The reaction is spontaneous if the cell potential isa) ...
Hiii..... I would like to tell this ques theoritically that means as we know that a reaction is spontaneous if
delta G is negative and by formula *delta G=(-nfE)* if E is positive only then our delta G can be negative and reaction can be spontaneous
delta G is negative and by formula *delta G=(-nfE)* if E is positive only then our delta G can be negative and reaction can be spontaneous
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The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer?
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The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer?.
The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer? for JEE 2024 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for JEE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The reaction is spontaneous if the cell potential isa) Positive b) Negative c) Zero d) Infinite Correct answer is option 'A'. Can you explain this answer?.
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