How hexane get grease out of cloth?

Answer 1

Hexanes will dissolve the large, non-volatile greasy molecules which form the stain (hexanes are non-polar, i.e. oily, and the oily molecules from the stain will dissolve in it, something they will not do well in water--hence the difficulty in getting them out of clothing). Once the grease stain is dissolved, and washed away in the hexane, any hexane molecules left in the clothing will evaporate, and will thus not stain the cloths themselves (if they were not light enough to evaporate they would be just as difficult to get out as the original stain).

Answer 2

Hexane is a non-polar solvent that can effectively dissolve oily and greasy substances due to its low polarity. When applied to a greasy stain on cloth, hexane can break down the grease molecules, allowing them to be lifted away from the fabric. The solvent then evaporates, leaving the cloth clean and grease-free.