Final answer:
Solid lithium reacts with nitrogen gas to produce lithium nitride according to the balanced chemical equation: 6 Li(s) + N2(g) → 2 Li3N(s), indicating the phases as solid and gas.
Step-by-step explanation:
The chemical equation for the reaction of solid lithium with nitrogen gas to produce solid lithium nitride is as follows:
6 Li(s) + N2(g) → 2 Li3N(s)
This equation is balanced and indicates that 6 moles of lithium (solid phase) react with 1 mole of nitrogen gas (gaseous phase) to produce 2 moles of lithium nitride (solid phase). Each substance is followed by its physical state in parentheses.