H2O is an oxidizing agent, LiH is a reducing agent (synproportionation (comproportionation)).
Reactants:
LiH
Names: Lithium hydride, Lithium monohydride
Appearance: Colorless to gray solid ; Odourless white-to-greyish hygroscopic solid in various forms. turns dark on exposure to light ; Odorless, off-white to gray, translucent, crystalline mass or white powder.
H2O – Water, oxidane
Other names: Water (H2O), Hydrogen hydroxide (HH or HOH), Hydrogen oxideDihydrogen monoxide (DHMO) (systematic name), Hydrogen monoxide, Dihydrogen oxide, Hydric acid, Hydrohydroxic acid, Hydroxic acid, Hydrol, Μ-oxido dihydrogen, Κ1-hydroxyl hydrogen(0)
Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
Products:
LiOH – Lithium hydroxide
Other names: Lithium hydrate, LiOH, Lithium hydroxide anhydrous