How will you provide the following information in a chemical equation?

Reaction conditions.

1. Chemical Equation: A chemical equation is a shorthand method to describe the reaction taking place in terms of symbols and formulae of substances involved in the reaction.
2. Reaction conditions - Reaction conditions involve the temperature and pressure conditions and they are provided above the arrow in a chemical equation.
3. Example- Nitrogen (${\mathrm{N}}_2$) and hydrogen (${\mathrm{H}}_2$) react to produce ammonia (${\mathrm{NH}}_3$) at a temperature 450$°$C and pressure around 200 -900 atm in presence of a catalyst (mixture of iron ($\mathrm{Fe}$) and molybdenum ($\mathrm{Mo}$))

$$\begin{gathered} {\mathrm{N}}_2\left(\mathrm{g}\right)+3{\mathrm{H}}_2\underset{\mathrm{Fe}+\mathrm{Mo}}{\overset{450°\mathrm{C},200-900\mathrm{atm}}{\to }}2{\mathrm{NH}}_3\left(\mathrm{g}\right) \\ \mathrm{Nitrogen}\mathrm{Hydrogen}\mathrm{Ammonia} \end{gathered}$$