Conversion of water into steam is a?

Explanation

The correct answer is Endothermic Reaction. The conversion of water into steam involves the absorption of heat energy to overcome the intermolecular forces holding the water molecules together in the liquid state. This process is endothermic because it requires energy input.Spontaneous Reaction is incorrect because the transition from water to steam requires energy input and occurs spontaneously only when heat is supplied. Exothermic Reaction is incorrect as it implies that energy is released, which is not the case in this scenario. Reversible Reaction is misleading in this context because while the phase change can be reversed, the process itself involves specific energy and entropy changes that are characteristic of endothermic reactions.