Aluminum forms a layer of aluminum oxide when exposed to air which protects the bulk metal from further corrosion. 4 al(s) + 3 o2(g) latex: \rightarrow → 2 al2o3(s) using the thermodynamic data provided below, calculate latex: \delta δs° for this reaction.

The ΔS° for this reaction is -626.22 J/K.

Explanation:

The equation used to calculate ΔS° is of a reaction is:  

The equation for the enthalpy change of the above reaction is:

We are given:

Putting values in above equation, we get:

The ΔS° for this reaction is -626.22 J/K.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.