t doesn't represent the concentration of AgCl dissolved in water because we assume that AgCl dissociates into Ag+ ions and Cl- ions when it dissolves in water. It can't represent the amount of solid AgCl in the system because the equilibrium is not affected by the amount of excess solid added to the system.
when it changes from a: solid to a liquid: melting, fusion gas: sublimation liquid to a solid:freezing gas:vaporization gas to a solid:condensation, deposition liquid: condensation, liquefacation
