JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
For the chemical reaction \(X\, \rightleftharpoons \,Y,\) the standard reaction Gibbs energy depends on temperature \(T\) (in \(K\) ) as \({\Delta _r}{G^o}\) (in \(kJ\,mol^{-1}\)) \(=120-\frac {3}{8}\,T\) The major component of the reaction mixture at \(T\) is
- A \(Y\) if \(T = 300\,K\)
- B \(Y\) if \(T = 280\,K\)
- C \(X\) if \(T = 350\,K\)
- D \(X\) if \(T = 315\,K\)
Answer & Solution
Correct Answer
(D) \(X\) if \(T = 315\,K\)
Step-by-step Solution
Detailed explanation
\(\Delta {G^o} = (120 - \frac{3}{8}\,T) = 0\) Then \(T = 320\,K\) Hence \(T > 320\,K\,Y\) formed \(T < 320\,K\,X\) formed
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