Answer:
Water vapor
Explanation:
Water vapor is the gaseous phase of water. Combustion of 1 cubic meter of fuel in a solid fuel furnace produces 0.8 liters of water vapor.
It can be produced by the evaporation of boiling water or the sublimation of ice. Water vapor is water in gaseous instead of liquid form. The water when it's boiling it doesn't disappear, it becomes gas, ,