For a reaction to be spontaneous at all tempe | vedclass

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(B) The spontaneity of a reaction is determined by the Gibbs free energy change equation: $\Delta G = \Delta H - T\Delta S$.For a reaction to be spont

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$\Delta H  0$

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(B) The spontaneity of a reaction is determined by the Gibbs free energy change equation: $\Delta G = \Delta H - T\Delta S$.For a reaction to be spontaneous, $\Delta G$ must be negative $(\Delta G If $\Delta H  0$ (increase in disorder), then $\Delta G = (	ext{negative}) - T(	ext{positive})$.Since $T$ is always positive in Kelvin, $\Delta G$ will be negative at all temperatures.Therefore, the correct condition is $\Delta H  0$.

For a reaction to be spontaneous at all temperatures, the values of enthalpy change $\Delta H$ and entropy change $\Delta S$ should be:

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