2KCLO3+heat makes 2KCL+3O2 is it endothermic or exothermic

The equation tells you heat must go IN so it is ENDOTERMIC. (See the connection to IN and EN)

The reaction 2KClO3 + heat → 2KCl + 3O2 is an endothermic reaction. In an endothermic reaction, heat is absorbed from the surroundings and is typically shown as a reactant. The heat provided in this reaction is necessary to break the bonds within the potassium chlorate (KClO3) molecule. As a result of this reaction, potassium chloride (KCl) and oxygen gas (O2) are produced.

To determine whether the given reaction is endothermic or exothermic, we need to understand the meaning of these terms.

An endothermic reaction is a chemical reaction that absorbs heat from its surroundings. As a result, the system's internal energy increases, while the surroundings cool down.

On the other hand, an exothermic reaction is a chemical reaction that releases heat into its surroundings. The system's internal energy decreases, while the surroundings heat up.

In the given reaction, 2KClO3 (potassium chlorate) is heated, and it decomposes into 2KCl (potassium chloride) and 3O2 (oxygen gas).

The reaction can be balanced as follows:

2KClO3 (s) -> 2KCl (s) + 3O2 (g)

Since the reaction releases oxygen gas and potassium chloride, it is an exothermic reaction. When heat is applied, the reaction proceeds, and energy is released in the form of heat, increasing the temperature of the surroundings.

It is exothermic in this equation 77.6kj energy is release in this reaction