A) -110.5
B) 110.5
C) 676.5
D) -676.5
Correct Answer: A
Solution :
\[{{C}_{(s)}}+\frac{1}{2}{{O}_{2(g)}}\xrightarrow[{}]{{}}CO(g);\Delta {{H}_{r}}=\Delta {{H}_{f}}(CO)\] \[\Delta {{H}_{f}}=\Delta {{H}_{C}}(C)-\Delta {{H}_{C}}(CO)\] \[=-393.5+283.5\] = - 110 kJ
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