Give a classification of the reaction according to all known signs: CuSO4 + Al = Al2 (SO4) 3 + Cu + Q

This reaction refers to reactions:

1. substitution reaction (one substance, simple Al, another complex, CuSO4, react, while a simple substance replaces one of the elements of a complex);

2. the reaction is redox (the oxidation states of the elements included in the formulas change before and after the reaction);

3. the reaction is exothermic (“+ Q” is indicated at the end of the reaction, hence the reaction proceeds with the release of heat);

4. the reaction is heterogeneous (substances that are different in their state of aggregation participate in the reaction).