For which of the following reactions is a positive value?
The entropy change is the change in the randomness of the system when the reactants undergo a reaction to form products.
Conventionally, the value of entropy should be higher for products.
When two reactants combine to form a single product, the disorderliness decreases. Hence, the entropy of the system decreases in going from reactants to products.
When a single reactant dissociates to form two or more products, the randomness in the products increases, hence, the entropy of the products increases, and that is favored.
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