TS EAMCET · Chemistry · Thermodynamics (C)
The bond enthalpies of heavy hydrogen, \(\mathrm{O}-\mathrm{O}\) and \(\mathrm{D}-\mathrm{O}\) are \(+400,+498\) and \(+490 \mathrm{~kJ} \mathrm{~mol}^{-1}\), respectively. The \(\Delta_{\mathrm{r}} \mathrm{H}^{\circ}\) of the reaction to produce \(\mathrm{D}_2 \mathrm{O}\) is
- A \(-300 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- B \(-331 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- C \(29.1 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
- D \(2.91 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
Answer & Solution
Correct Answer
(B) \(-331 \mathrm{~kJ} \mathrm{~mol}^{-1}\)
Step-by-step Solution
Detailed explanation
\(\mathrm{D}_2+\frac{1}{2} \mathrm{O}_2 \rightarrow \mathrm{D}_2 \mathrm{O}\) \(\Delta_{\mathrm{r}} \mathrm{H}^{\circ}=\) Bond enthalpies of…
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