How can you tell if an element has been reduced? O A. The number of its electrons has not changed in the reaction
O B. It has fewer electrons in the product than in the reactant
C. It has a positive oxidation state in the product.
D. It has more electrons in the product than in the reactant.

The answer;

C. It has a positive oxidation state in the product.

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answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

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