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Chemistry · PYQ NEET UG 2017
हिन्दीFor a given reaction, \( \Delta H = 35.5\text{ kJ mol}^{-1} \) and \( \Delta S = 83.6\text{ J K}^{-1}\text{ mol}^{-1} \). The reaction is spontaneous at _______.\n(Assume that \( \Delta H \) and \( \Delta S \) do not vary with temperature)
Correct answer · Option 2
\( \text{T} > 425\text{ K} \)
Explanation
For spontaneity, \( \Delta G = \Delta H - T\Delta S < 0 \Rightarrow T > \frac{\Delta H}{\Delta S} = \frac{35500}{83.6} \approx 424.6\text{ K} \approx 425\text{ K} \).
