JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
\(\begin{aligned}
& \mathrm{S}(\mathrm{~g})+\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{SO}_3(\mathrm{~g})+2 x \mathrm{kcal} \\
& \mathrm{SO}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{SO}_3(\mathrm{~g})+y \mathrm{kcal}
\end{aligned}\)
The heat of formation of \(\mathrm{SO}_2(\mathrm{~g})\) is given by :
- A \(x+y \mathrm{kcal}\)
- B \(y-2 x \mathrm{kcal}\)
- C \(\frac{2 x}{y} \mathrm{kcal}\)
- D \(2 x+y \mathrm{kcal}\)
Answer & Solution
Correct Answer
(B) \(y-2 x \mathrm{kcal}\)
Step-by-step Solution
Detailed explanation
(i) \(\mathrm{S}(\mathrm{g})+\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{SO}_3(\mathrm{~g})+2 x\) kcal \(\Delta \mathrm{H}_1\) (ii) \(\mathrm{SO}_2(\mathrm{~g})+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{SO}_3(\mathrm{~g})+y\) kcal…
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