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

निम्नलिखित अभिक्रिया पर विचार करें जो \(27^{\circ} \mathrm{C}\) और \(1 \mathrm{~atm}\) दाब पर साम्य की ओर बढ़ रहा है \(\mathrm{A}+\mathrm{B} \underset{\mathrm{K}_{\mathrm{r}}=10^2}{\stackrel{\mathrm{K}_{\mathrm{F}}=10^3}{\rightleftharpoons}} \mathrm{C}+\mathrm{D} 27^{\circ} \mathrm{C}\) पर मानक गिब्ज ऊर्जा परिवर्तन \(\left(\Delta_{\mathrm{r}} \mathrm{G}^\theta\right)(-)\) \(\mathrm{kJ} \mathrm{mol}^{-1}\) है: (निकटतम पूर्णाक). (दिया गया है : \(\mathrm{R}=8.3 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\) एवं \(\ln 10=2.3\) )

  1. A \(6\)
  2. B \(3\)
  3. C \(12\)
  4. D \(9\)
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Answer & Solution

Correct Answer

(A) \(6\)

Step-by-step Solution

Detailed explanation

\(\because \Delta G ^{\circ}=- RT \ln K _{ eq }\) \(\text { and } K _{ eq }=\frac{ K _{ f }}{ K _{ b }}\) \(\therefore K _{ eq }=\frac{10^3}{10^2}=10\) \(\therefore \Delta G =- RT \ln 10\) \(\Rightarrow-(8.3 \times 300 \times 2.3)=-5.7\,kJ\,mole ^{-1} \approx 6\,kJ\)…
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