AP EAMCET · Chemistry · Thermodynamics (C)
For a reaction to be spontaneous, the required conditions are
- A \(\Delta_r H^{\circ}=-\) ve, \(\Delta_r S^{\circ}=-\) ve, at high \(T\).
- B \(\Delta_r H^{\circ}=+\) ve, \(\Delta_r S^{\circ}=+\) ve, at high \(T\).
- C \(\Delta_r H^{\circ}=+\) ve, \(\Delta_r S^{\circ}=+\) ve, at low \(T\).
- D \(\Delta_r H^{\circ}=+\) ve, \(\Delta_r S^{\circ}=-\) ve, at all \(T\).
Answer & Solution
Correct Answer
(B) \(\Delta_r H^{\circ}=+\) ve, \(\Delta_r S^{\circ}=+\) ve, at high \(T\).
Step-by-step Solution
Detailed explanation
Depending upon the sign and magnitude of \(\Delta H\) and \(-T \Delta S\), the sum of these terms determines the sign of \(\Delta G\). This sign of \(\Delta G\) will determine i.e. if \(\Delta G\) is negative then the reaction is spontaneous and if \(\Delta G\) is positive then…
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