A) \[21.16\,kJ\]
B) \[-21.10\,kJ\]
C) \[-13.62\,kJ\]
D) \[13.6\,kJ\]
Correct Answer: B
Solution :
\[\Delta {{H}_{(\text{reaction})}}=2\Delta H_{f}^{0}\,(MgO)=-\Delta H_{f}^{0}\,(Si{{O}_{2}})\] \[=2\,(-\,34.7)-(-\,48.4)=-21\,kJ.\]You need to login to perform this action.
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