An industrial cell electrodes from at an applied potential difference of while…

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

An industrial cell electrodes

\text{Zn}(s)

from

\text{Zn}^{2+}(aq)

at an applied potential difference of

3.00\,\text{V}

while delivering a constant

50.0\,\text{A}

for

2.00\,\text{h}

. The standard potential for the half-reaction

\text{Zn}^{2+} + 2\,e^- \rightarrow \text{Zn}(s)

-0.76\,\text{V}

. Using these data, determine the energy efficiency of the cell, defined as (useful chemical energy)/(electrical energy supplied)

\times 100\,\%

. (Faraday constant:

F = 9.65\times10^{4}\,\text{C mol}^{-1}

) (a)

51\,\%

(b)

13\,\%

(c)

25\,\%

(d)

41\,\%