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

\(298 \mathrm{~K}\) ताप पर अभिक्रिया \(\mathrm{A} \leftrightharpoons \mathrm{B}\) के लिए \(\log \mathrm{K}\) का मान....... है। (निकटतम पूर्णाक) दिया है : \(\Delta \mathrm{H}^0=-54.07 \mathrm{~kJ} \mathrm{~mol}^{-1}\) \(\Delta \mathrm{S}^{\circ}=10 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\) \((2.303 \times 8.314 \times 298=5705\) लें \()\)

  1. A \(11\)
  2. B \(12\)
  3. C \(14\)
  4. D \(10\)
Verified Solution

Answer & Solution

Correct Answer

(D) \(10\)

Step-by-step Solution

Detailed explanation

\(\Delta G ^0=\Delta H ^0- T \Delta S\) \(\Rightarrow \Delta G ^0=(-54070-10 \times 298)\) Also, \(\Delta G ^0=(-2.303 RT \log K )\) \(\Rightarrow(-54070-10 \times 298)\) \(=(-2.303 \times 8.134 \times 298 \log K )\) \(\Rightarrow \log K =10 \text { Ans: } 10\)
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