in which reaction entrophy change is negative??
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Answer: Exothermic
Explanation: If a reaction is exothermic ( H is negative) and the entropy S is positive (more disorder), the free energy change is always negative and the reaction is always spontaneous.
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Answer:
The negative sign means that an exothermic reaction (ΔH is negative, heat given out) produces an increase in the entropy of the surroundings. The more negative the value of ΔH, the more positive the entropy increase of the surroundings.
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