Which of the following indicates that an exothermic reaction has occurred? temperature increases heat is absorbed salt is produced water is formed

Option (a) is the correct answer.

Explanation:

A reaction where heat energy is absorbed by the molecules of a substance is known as an endothermic reaction.

The value of is positive for an endothermic process. This also means that a decrease in temperature occurs with absorption of heat.

Whereas when energy is released by the molecules of a substance in a reaction then it is known as an exothermic reaction.

The value of is negative for an exothermic process. This means an increase in temperature occurs with release of heat energy.

Thus, we can conclude that temperature increases indicates that an exothermic reaction has occurred.

the answer is 1 i believe

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.