Edit: I read a reaction in a book which talks about reaction between Isobutene and water, in presence of small amount of catalyst at 25 degree Celsius. Now, the solvent isn't mentioned. I assume Isobutene at that temperature is gas, while water is in liquid phase. Does it mean isobutene is bubbled through water? Why does bubbling the gas through water cause the reaction, or many reactions to happen? I mean, even the bubbles are in gas phase aren't they? So how is reaction between two different phases occurring so fast?