E-SRP of different half cells are given- E-Cu2-Cu - 0-34 volt- E-Zn2-Zn - - 0-76 volt E-Ag-Ag - 0-8 volt - E-Mg2-Mg - - 2-37 volt Which of the following has the most negative - G- value-

The correct option is B Zn(s)|Zn^2+(1M)||Ag^+ (1M))| Ag(s)E^0_cell=E^0_cathode E^0_anode More postive the value of E^0_cell, △ G^0 will be more negative. △ G^0 ...

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Byju's Answer

Standard XII

Chemistry

Gibb's Free Energy

E∘SRP of diff...

Question

$E^{\circ} (S R P)$ of different half cells are given:-
$E_{C u^{2 +} / C u}^{\circ} = 0.34 v o l t; E_{Z n^{2 +} / Z n}^{\circ} = - 0.76 v o l t$
$E_{A g^{+} / A g}^{\circ} = 0.8 v o l t; E_{M g^{2 +} / M g}^{\circ} = - 2.37 v o l t$
Which of the following has the most negative $Δ G^{\circ}$ value?

Z n (s) | Z n^{2 +} (1 M) | | M g^{2 +} (1 M) | M g (s)

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Z n (s) | Z n^{2 +} (1 M) | | A g^{+} (1 M)) | A g (s)

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C u (s) | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g (s)

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A g (s) | A g^{+} (1 M) | | M g^{2 +} (1 M) | M g (s)

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Solution

The correct option is B $Z n (s) | Z n^{2 +} (1 M) | | A g^{+} (1 M)) | A g (s)$
$E_{c e l l}^{0} = E_{c a t h o d e}^{0} - E_{a n o d e}^{0}$
More postive the value of $E_{c e l l}^{0}$ , $△ G^{0}$ will be more negative.
$△ G^{0} = - n F E_{c e l l}^{0}$
For option A, $E_{c e l l}^{0} = - 1.61$
For option B, $E_{c e l l}^{0} = 1.56$
For option C, $E_{c e l l}^{0} = 0.46$
For option D, $E_{c e l l}^{0} = - 1.98$

$Δ G^{\circ}$ is the most negative for (B).

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Similar questions

Q. The emf

(E^{\circ})

of the following cells are:

A g / A g^{+} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = - 0.46 v o l t

Z n / Z n^{2 +} (1 M) ∥ C u^{2 +} (1 M) | C u; E^{\circ} = + 1.10 v o l t

Calculate the emf of the cell:

Z n | Z n^{2 +} (1 M) ∥ A g^{+} (1 M) | A g

Q. The EMF of the following cells are:

C u | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g, E^{0} = 0.46 V

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u, E^{0} = 1.10 V

The EMF of the cell

Z n | Z n^{2 +} (1 M) | | A g^{+} (1 M) | A g

will be:

Q. The EMFs of the following cells are

C u | C u^{2 +} (1 M) | | A g^{+} (1 M) | A g, E^{o} = 0.46 V

Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u, E^{o} = 1.10 V

The EMF of the cell

Z n | Z n^{2 +} | | A g^{+} (1 M) | A g

will be:

E_{A g^{+} | A g}^{\circ} = 0.8

volt and

E_{Z n^{2 +} | Z n}^{\circ} = - 0.76

volt

Which of the following is correct?

Below given are emf of three galvanic cells, represented by $E_{1}$ , $E_{2}$ and $E_{3}$ . Which of the following is true?

I. $Z n | Z n^{2 +} (1 M) | | C u^{2 +} (1 M) | C u$

II. $Z n | Z n^{2 +} (0.1 M) | | C u^{2 +} (1 M) | C u$

III. $Z n | Z n^{2 +} (1 M) | | C u^{2 +} (0.1 M) | C u$

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E∘(SRP) of different half cells are given:- E∘Cu2+/Cu=0.34 volt;E∘Zn2+/Zn=−0.76 volt E∘Ag+/Ag=0.8 volt;E∘Mg2+/Mg=−2.37 volt Which of the following has the most negative ΔG∘ value?