| [a] \[2F{{e}_{2}}{{O}_{3}}\left( s \right) + 3C\left( s \right)\,\,\to \,4Fe\left( s \right) +3C{{O}_{2}}\left( g \right)\] |
| \[\Delta H_{f}^{0}\,of\,\,F{{e}_{2}}{{O}_{3}}\,\,and\,\,C{{O}_{2}}\,are-8242\,\,kJ\,\,mol{{e}^{\text{-1}}}\] and \[-393.7 kJ mole{{\,}^{-}}^{1}\] |
| The reaction is |
A) Endothermic
B) Exothermic
C) \[\Delta H=0\]
D) None of these
Correct Answer: A
Solution :
\[\Delta H={{(\Delta H_{f}^{0})}_{Products}}-(\Delta H_{f}^{0}){{\,}_{Reactants}}\] \[= 3 \times \left( -\,393.7 \right)-2\times \left( -\,824.2 \right)\] \[=\,\,476.3 \,kJ/mole\]
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