Question

How hydration enthalpy is reaponsible for slowly reaction of li with water?

Answer 1

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Answer 2

Why does lithium react with water less vigorously, compared to other S-block elements, in terms of thermodynamics?

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All the elements of Group 1 react vigorously with water to give metal hydroxides and liberate hydrogen gas, but this reactivity increases down the group.

Lithium's density is only about half that of water, so it floats on the surface and ultimately disappears, giving off hydrogen gas and forming a colourless solution of lithium hydroxide. But unlike the rest of the s-block elements, this reaction is not vigorous.

2Li(s)+2H2O(l)→2LiOH(aq)+H2(g)