A) \[+\,431.99\]
B) \[-\,246.37\]
C) \[-\,431.99\]
D) \[+\,247.37\]
E) None of the above
Correct Answer: E
Solution :
(*) For reaction, \[\frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}C{{l}_{2}}(g)\xrightarrow{{}}HCl(g)\] \[\Delta H=\Delta {{H}_{f}}(HCl)\] \[-\left[ \frac{1}{2}\times \Delta {{H}_{f}}({{H}_{2}})+\frac{1}{2}\times \Delta {{H}_{f}}(C{{l}_{2}}) \right]\] \[=-92.31-\left[ \frac{1}{2}\times (218)+\frac{1}{2}\times (121.68) \right]\] \[=-262.15\text{ }kJ\]
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