The reaction 4al (s) 3o2 (

2 answers:

8 0

The reaction 4al (s) 3o2 (
g. → 2al2o3 (s) δh° = -3351 kj is exothermic________, and therefore heat is _____release ___ by the reaction.

Hunter-Best [27]3 years ago

6 0

Answer: The reaction is exothermic and therefore the heat is released by the reaction.

Explanation:

There are 2 types of reaction based on the heat of the reaction:

Exothermic reactions are defined as the reactions in which energy is released in the form of heat. The enthalpy change $(\Delta H^o)$ of the reaction comes out to be negative for this kind of reaction.
Endothermic reactions are defined as the reactions in which energy is absorbed in the form of heat. The enthalpy change $(\Delta H^o)$ of the reaction comes out to be positive for this kind of reaction.

For the given chemical reaction:

$4Al(s)+3O_2(g)\rightarrow 2Al_2O_3(s);\Delta H^o=-3351kJ$

As, the enthalpy change of the reaction is negative. The reaction is considered as an exothermic reaction.

Hence, the reaction is exothermic and therefore the heat is released by the reaction.

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