The following reaction occurs in a button cel | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The overall cell reaction is the sum of the two half-reactions:$Zn + Ag_{2}O + H_{2}O \rightarrow Zn^{2+} + 2Ag + 2OH^{-}$The standard cell potent

Vedclass · Accepted Answer

$-2.12 	imes 10^{5} \ J$

Vedclass · Answer

(A) The overall cell reaction is the sum of the two half-reactions:$Zn + Ag_{2}O + H_{2}O ightarrow Zn^{2+} + 2Ag + 2OH^{-}$The standard cell potential $E^{o}_{cell}$ is given by:$E^{o}_{cell} = E^{o}_{cathode} - E^{o}_{anode}$$E^{o}_{cell} = 0.34 \ V - (-0.76 \ V) = 1.10 \ V$The number of electrons transferred in the balanced equation is $n = 2$.The standard Gibbs free energy change is calculated using the formula:$\Delta G^{o} = -nFE^{o}_{cell}$where $F \approx 96500 \ C \ mol^{-1}$.$\Delta G^{o} = -2 	imes 96500 \ C \ mol^{-1} 	imes 1.10 \ V$$\Delta G^{o} = -212300 \ J \ mol^{-1} = -2.123 	imes 10^{5} \ J \ mol^{-1}$.

Similar Questions

Which of the following reactions is correct for a given electrochemical cell at $25^{\circ} C$ ?
$Pt | Br_{2(g)} | Br_{(aq)}^{-} || Cl_{(aq)}^{-} | Cl_{2(g)} | Pt$

Give the symbolic representation of the following galvanic cells:
$(i)$ Daniell cell
$(ii)$ Copper-Silver cell

At $25^{\circ} C$,the molar conductance at infinite dilution for the strong electrolytes $NaOH$,$NaCl$ and $BaCl_{2}$ are $248 \times 10^{-4}$,$126 \times 10^{-4}$ and $280 \times 10^{-4} \ S \ m^{2} \ mol^{-1}$ respectively. $\lambda_{m}^{o} Ba(OH)_{2}$ in $S \ m^{2} \ mol^{-1}$ is

The reaction $\frac{1}{2} H_{2(g)} + AgCl_{(s)} \rightarrow H^+_{(aq)} + Cl^-_{(aq)} + Ag_{(s)}$ occurs in which of the following galvanic cells?

Which of the following statements is correct regarding the cathode of an electrochemical cell?

Vedclass Test Series

Exam Paper Generator

Online Exam Module