NEET 2010 Chemistry question
The following two reactions are known
Fe_2O_{3(s)} + 3CO_{(g)} 2Fe_{(s)} + 3CO_{2(g)}\ ;\ Δ H = -26.8\ kJ
FeO_{(s)} + CO_{(g)} Fe_{(s)} + CO_{2(g)}\ ;\ Δ H = -16.5\ kJ
The value of for the following reaction
Fe_2O_{3(s)} + CO_{(g)} 2FeO_{(s)} + CO_{2(g)}
is :
Answer: (4)
Solution
Apply Hess's law. Multiply the second equation by 2: , kJ. Subtract this from the first equation: $Fe_2O_3 + 3CO - (2FeO + 2CO) → (2Fe + 3CO_2) -
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