Question

1. h₂o particles go from being able to slide about, with a fixed volume but shape defined by its container, to having an organized structure with a fixed shape and volume, with particles unable to move freely.

what phase change occurred:
fill in the formula to indicate the initial phase and final phase of the situation described above: h₂o₍₎→h₂o₍₎

Explanation:

Step1: Identify initial and final states

The initial state where water particles can slide about with a fixed volume and shape defined by the container is the liquid state. The final state with an organized structure, fixed shape and volume and particles unable to move freely is the solid state.

Step2: Determine phase - change name

The phase - change from liquid to solid is called freezing.

Step3: Write phase symbols

The symbol for the liquid phase is (l) and for the solid phase is (s). So the formula is $H_2O_{(l)}\to H_2O_{(s)}$.

Answer:

Phase change: Freezing
Formula: $H_2O_{(l)}\to H_2O_{(s)}$