Question

What happens when steam is passed over red hot coke?

Answer 1

When steam is passed over red hot coke, then water gas is formed.

Water-gas is a mixture of carbon monoxide and hydrogen (CO+H₂).

$$\begin{gathered} \mathrm{C}+{\mathrm{H}}_2\mathrm{O}\stackrel{1270\mathrm{K}}{\to }\mathrm{CO}+{\mathrm{H}}_2 \\ \mathrm{Carbon}\mathrm{water}\mathrm{Water}\mathrm{gas} \end{gathered}$$