JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
The standard reaction Gibbs energy for a chemical reaction at an absolute temperature \(T\) is given by \({\Delta _r}{G^o} = A - BT\) Where \(A\) and \(B\) are non -zero constant. Which of the following is \(TRUE\) about this reaction?
- A Endothermic if \(A > 0\)
- B Exothermic if \(A > 0\) and \(B < 0\)
- C Endothermic if \(A < 0\) and \(B > 0\)
- D Exothermic if \(B < 0\)
Answer & Solution
Correct Answer
(A) Endothermic if \(A > 0\)
Step-by-step Solution
Detailed explanation
\(\Delta {G^o} = \Delta {H^o} - T\Delta {S^o}\) \(\Delta {G^o} = A - BT\) In endothermic reaction \(\Delta H = + ve\). Hence, \(A = +ve\)
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