JEE Mains · Chemistry · STD 11 - 5. Thermodynamics and thermochemistry
The standard enthalpy and standard entropy of decomposition of \(\mathrm{N}_2 \mathrm{O}_4\) to \(\mathrm{NO}_2\) are \(55.0 \mathrm{~kJ} \mathrm{~mol}^{-1}\) and \(175.0 \mathrm{~J} / \mathrm{K} / \mathrm{mol}\) respectively. The standard free energy change for this reaction at \(25^{\circ} \mathrm{C}\) in J \(\mathrm{mol}^{-1}\) is ______. (Nearest integer)
- A 2850
- B 2750
- C 2950
- D 2650
Answer & Solution
Correct Answer
(A) 2850
Step-by-step Solution
Detailed explanation
\begin{aligned} & \Delta \mathrm{H}_{\mathrm{rxn}}^{\mathrm{o}}=55 \mathrm{~kJ} / \mathrm{mol}, \quad \mathrm{T}=298 \mathrm{~K} \\ & \Delta \mathrm{~S}_{\mathrm{rxn}}^{\mathrm{o}}=175 \mathrm{~J} / \mathrm{mol} \\ & \Delta \mathrm{G}_{\mathrm{rxn}}^{\mathrm{o}}=\Delta…
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