Question

H2SO4 + BaCl2 = BaSO4 + 2 HCl экзотермическая или эндотермическая реакция?

Answer 1

Эндотермическая реакция

Answer 2

Эндотермическая...............

Answer 3

The given chemical equation is:

H2SO4 + BaCl2 = BaSO4 + 2 HCl

To determine whether the reaction is exothermic or endothermic, we need to consider the energy changes that occur during the reaction.

An exothermic reaction is a chemical reaction that releases energy in the form of heat. In this type of reaction, the products have lower energy than the reactants, and energy is released to the surroundings.

On the other hand, an endothermic reaction is a chemical reaction that absorbs energy in the form of heat. In this type of reaction, the products have higher energy than the reactants, and energy is taken in from the surroundings.

To ascertain the nature of the reaction, we need to compare the energy of the reactants (H2SO4 + BaCl2) to the energy of the products (BaSO4 + 2 HCl).

In the given reaction, BaSO4 is a solid (a precipitate) and HCl is a gas. Typically, the formation of a solid from the reactants in a solution (like BaSO4) is an indication of an exothermic reaction, as energy is released during the process of forming the solid lattice.

Additionally, when HCl is produced, it is in the gaseous state, and this is another indication of an exothermic reaction, as the formation of gas usually releases energy.

Therefore, the reaction H2SO4 + BaCl2 = BaSO4 + 2 HCl is an exothermic reaction since it releases energy in the form of heat.