\(\Delta {S_{fus}}\,\, = \,\,\frac{{\Delta {H_{fus}}}}{T}\,\, = \,\,\frac{{6000\,J\,\,mo{l^{ - 1}}}}{{273\,K}}\,\, \Rightarrow \,\,\,21.97\,\,J\,{K^{ - 1}}\,mo{l^{ - 1}}\)
$\left( i \right)\,2F{e_2}{O_3}\left( s \right) \to 4Fe\left( s \right) + 3{O_2}\left( g \right)$
${\Delta _r}{G^o} = + 1487.0\,kJ\,mo{l^{ - 1}}$
$\left( {ii} \right)\,2CO\left( g \right) + {O_2}(g) \to 2C{O_2}\left( g \right)$
${\Delta _r}{G^o} = - 514.4\,kJ\,mo{l^{ - 1}}$
તો નીચેની પ્રક્રિયા માટે મુક્ત ઊર્જા ફેરફાર $\Delta_rG^o$ .....$kJ\, mol^{-1}$
$\,2F{e_2}{O_3}\left( s \right) + 6CO\left( g \right) \to 4Fe\left( s \right) + 6C{O_2}\left( g \right)$
$2Al + C{r_2}{O_3} \to A{l_2}{O_3} + 2Cr$