Question

Complete the following equation:

$\mathrm{Zn}+\mathrm{S}\stackrel{}{\to }----$

Answer 1

Exothermic reaction:

• It is a type of chemical reaction that proceeds with the evolution of heat energy called an exothermic reaction.
• In general exothermic reaction is represented as
• $\mathrm{A}+\mathrm{B}\stackrel{}{\to }\mathrm{C}+\mathrm{D}+\mathrm{Heat}\mathrm{energy}$
• For example zinc$\left(\mathrm{Zn}\right)$ reacts with sulphur$\left(\mathrm{S}\right)$ resulting in the formation of zinc sulphide$\left(\mathrm{ZnS}\right)$ and a tremendous amount of energy is released in the form of heat.
• $\underset{\mathrm{zinc}}{\mathrm{Zn}\left(\mathrm{s}\right)}+\underset{\mathrm{sulphur}}{\mathrm{S}\left(\mathrm{s}\right)}\stackrel{}{\to }\underset{\mathrm{zinc}\mathrm{sulphide}}{\mathrm{ZnS}\left(\mathrm{s}\right)}+\mathrm{Heat}\mathrm{energy}$