Question

The chemical reaction 2Cu + O2 → 2CuO + 315 kJ is an _____ reaction. Endothermic, combustion Exothermic, combustion Endothermic, single replacement Exothermic, single replacement

Answer 1

the awnser is exothermic (combustion)

Answer 2

Answer: Exothermic

Step-by-step explanation: Combustion reaction is a chemical reaction in which hydrocarbon burns in the presence of oxygen to form carbon dioxide, water and energy.

Exothermic reactions are those in which energy is released and endothermic reactions are those in which energy is absorbed.

A single replacement reaction is one in which a more reactive element displaces a less reactive element from its salt solution.

`2Cu+O_2\rightarrow 2CuO+315kJ`

As in the given reaction, the energy is released thus reaction s exothermic.