Explanation :

Water gas is a fuel gas consisting of a mixture of carbon monoxide (CO) and hydrogen gas (H2), also known as “synthesis gas” or “syngas”. The term “water gas” comes from the fact that it is produced by reacting steam with hot coke (a form of coal) or other carbonaceous materials in a process called gasification .

The balanced chemical equation for the production of water gas from steam and coke can be written as follows:

C(s) + H2O(g) → CO(g) + H2(g)