Why Roasting Is Exothermic?

The process of heating of ore to a high temperature in presence of air is known as roasting. Thus, the statement 'it is the process of heating ore in air to obtain the oxide' is correct. During roasting, a large amount of acidic, metallic and other toxic compounds are released. Thus, roasting is an exothermic process.

Is roasting exothermic?

Roasting is an exothermic reaction. This heat helps to keep the roaster at the required roasting temperature so that the process can continue with little extra heat supplied by the burning fuel. Hence, sulfide roasting is an autogenous process, that is, where no extra fuel is supplied.

Is roasting a combustion?

combustion reaction occur in roasting but not in calcination.