A) 105, 700 cal
B) 61, 000 cal
C) 105, 000 cal
D) 60, 000 cal
E) 62, 300 cal
Correct Answer: E
Solution :
\[Zn\xrightarrow{{}}ZnO+84,000\,cal\] \[\begin{align} & \underline{HgO\xrightarrow{{}}Hg+(84,000-21,700)cal\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ & Zn+HgO\xrightarrow{{}}ZnO+Hg+(84,000-21,700)cal \\ \end{align}\] So, heat of formation of the reaction \[Zn+HgO\xrightarrow{{}}Hg,\]is \[=(84,000-21,700)\text{ }cal\] \[=62300\text{ }cal\]You need to login to perform this action.
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