The following two reactions are known [AIPMT (M) 2010] |
\[F{{e}_{2}}{{O}_{3}}(s)+3CO(g)\xrightarrow[{}]{{}}2Fe(s)+3C{{O}_{2}}(g);\]\[\Delta H=-26.8\,kJ\] |
\[FeO(s)+CO(g)\xrightarrow[{}]{{}}Fe(s)+C{{O}_{2}}(g);\]\[\Delta H=-16.5\,kJ\] |
The value of \[\Delta H\] for the following reaction |
\[F{{e}_{2}}{{O}_{3}}(s)+CO(g)\xrightarrow[{}]{{}}2FeO(s)+C{{O}_{2}}(g)\] |
A) \[+10.3\,kJ\]
B) \[-\,43.3\,kJ\]
C) \[-\,10.3\,kJ\]
D) \[+\,6.2\,kJ\]
Correct Answer: D
Solution :
Given, |
(I) |
(II) |
On multiplying Eq (II) with 2, we get |
(III) |
On subtracting Eq (III) from I, we get |
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