A) ? 284.5 kJ
B) 284.5 kJ
C) 384.5 kJ
D) ? 384.5 kJ
Correct Answer: A
Solution :
\[C{{O}_{(g)}}+\frac{1}{2}{{O}_{2}}_{(g)}\to C{{O}_{(g)}},\Delta n=1-1+\frac{1}{2}=-\frac{1}{2}\] \[\Delta H=\Delta E+\Delta nRT\] \[\Delta H=-283.3-\frac{1}{2}\times \frac{8.314}{1000}\times 290=-284.5kJ\].
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