Answer
a) 11.2 kg
Work Step by Step
Energy consumed per mole of Cu=
$\frac{333.8\,kJ}{4\,mol\,Cu}=83.45\,\,kJ/mol$
$\implies $ Moles of Cu produced=
(Energy consumed)$\div$ (83.45 kJ/mol)
$=\frac{1.47\times10^{4}\,kJ}{83.45\,kJ/mol}=176.15\,mol$
Mass of Cu produced=
moles of Cu$\times$ molar mass of Cu
$=176.15\,mol\times 63.546\,g/mol= 11200\,g$
$=11.2\,kg$
Option (a) is correct.
