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JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry

दिया गया है : (A) \(2 \mathrm{CO}(\mathrm{g})+\mathrm{O}_2(\mathrm{~g}) \rightarrow 2 \mathrm{CO}_2(\mathrm{~g}) \quad \Delta \mathrm{H}_1^\theta=-\mathrm{xkJ} \mathrm{mol}^{-1}\) (B) \(\mathrm{C}\) (graphite) \(+\mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}_2(\mathrm{~g}) \Delta \mathrm{H}_2^\theta=-\mathrm{ykJ} \mathrm{mol}^{-1}\) निम्न अभिक्रिया के लिए \(\Delta \mathrm{H}^\theta\) हैं : \(\mathrm{C}\) (graphite) \(+\frac{1}{2} \mathrm{O}_2(\mathrm{~g}) \rightarrow \mathrm{CO}(\mathrm{g})\) है :

  1. A \(\frac{x-2 y}{2}\)
  2. B \(\frac{x+2 y}{2}\)
  3. C \(\frac{2 x - y }{2}\)
  4. D \(2 y-x\)
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Answer & Solution

Correct Answer

(A) \(\frac{x-2 y}{2}\)

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Detailed explanation

Target equation \(C \text { (graphite) }+\frac{1}{2} O _{2( g )} \rightarrow CO _{( g )} \ldots \text {.(i) } \Delta H\) \(C \left(\text { graphite) }+ O _{2( g )} \rightarrow CO _{2( g )} \text {.(ii) } \Delta H _1=- y\,kJ / mole \right.\)…
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