Write balanced equations describing the reaction of lithium metal with each of the following: \(\mathrm{O}_{2}, \mathrm{S}, \mathrm{Cl}_{2}, \mathrm{P}_{4}, \mathrm{H}_{2}, \mathrm{H}_{2} \mathrm{O},\) and HCl.

The balanced equations for the reaction of lithium with the given substances are as follows: 1. \(\mathrm{Li} + \mathrm{O}_{2}\): \[4 \mathrm{Li} + \mathrm{O}_{2} \rightarrow 2 \mathrm{Li}_{2}\mathrm{O}\] 2. \(\mathrm{Li} + \mathrm{S}\): \[2 \mathrm{Li} + \mathrm{S} \rightarrow \mathrm{Li}_{2}\mathrm{S}\] 3. \(\mathrm{Li} + \mathrm{Cl}_{2}\): \[2 \mathrm{Li} + \mathrm{Cl}_{2} \rightarrow 2 \mathrm{Li}\mathrm{Cl}\] 4. \(\mathrm{Li} + \mathrm{P}_{4}\): \[12 \mathrm{Li} + \mathrm{P}_{4} \rightarrow 4 \mathrm{Li}_{3}\mathrm{P}\] 5. \(\mathrm{Li} + \mathrm{H}_{2}\): \[2 \mathrm{Li} + \mathrm{H}_{2} \rightarrow 2 \mathrm{Li}\mathrm{H}\] 6. \(\mathrm{Li} + \mathrm{H}_{2}\mathrm{O}\): \[2 \mathrm{Li} + 2 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{Li}\mathrm{OH} + \mathrm{H}_{2}\] 7. \(\mathrm{Li} + \mathrm{H}\mathrm{Cl}\): \[2 \mathrm{Li} + 2 \mathrm{H}\mathrm{Cl} \rightarrow 2 \mathrm{Li}\mathrm{Cl} + \mathrm{H}_{2}\]