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Nucleophilic and Electrophilic Substitution in Aryl Halides

Why does the ...

Question

Why does the change in entropy of the universe has to be positive forthe reaction to be spontaneous?

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Δ G

is the net energy available to do useful work and is a measure of free energy. If a reaction has positive enthalpy change and positive entropy change, under what conditions will the reaction be spontaneous?

Δ

G is the net energy available to do useful work and is a measure of free energy. If a reaction has positive enthalpy change and positive entropy change, under what conditions will the reaction be spontaneous?

Q. For a reaction both enthalpy change and entropy change are positive. Under what conditions the reaction will be spontaneous?

Q. Assertion :The thermodynamic factor which determines the spontaneity of a process is the free energy. For a process to be spontaneous the free energy must be -ve Reason: The change in free energy is related to the change in enthalpy and change in entropy. The change in entropy for a process must always be positive if it is spontaneous.

Q. A reversible reaction is at temperature

T

(K)

. Both enthalpy change and entropy change have positive values. Let

T^{'}

represents the equilibrium temperature.

For the reaction to be spontaneous, which of the following conditions should be satisfied?

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Nucleophilic and Electrophilic Substitution in Aryl Halides

Standard XII Chemistry

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