ldenify each of the following changes of state as testing. fracking, sublimation, se deposition:

a. Dry ice in an ice cream cart disappears,

h. Snowy an the ground turns to liquid water.

c. Heat is removed from$125\mathrm{z}$of liquids water at$0{}^{\circ }\mathrm{C}$.

d. Frost (ice) forms of the walls of a freezer unit of a refrigerator.

ldenify each of the following changes of state as testing. fracking, sublimation, or deposition:

(a) Matter exists in three states: gases, liquids, and solids. Heat absorption or evolution causes a change in the state of matter. The temperature remains constant during the transition.

Dry ice is a solid substance. Sublimation occurs when a substance in a solid state changes directly into a gas without passing through the liquid state. Due to heat absorption, dry ice in the solid state is converted directly into a gas without being converted into a liquid state and thus disappears.

As a result, the given state change is sublimation.

(b) Snow is in the solid state and is being converted into liquid water. When a solid substance absorbs enough heat, it transforms into a liquid due to an increase in particle motion at a certain temperature. This is referred to as melting. The melting point of a substance is the temperature at which a solid transforms into a liquid. Heat is absorbed by snow on the ground, which melts into liquid water.

As a result, the given state change is melting.

(c) If heat is removed from liquid water at it solidifies because is the freezing point of water. When heat is removed from a substance or it is sufficiently cooled that it solidifies, the process is referred to as freezing. A substance's freezing point is the temperature at which it freezes.

As a result, the given state change is freezing.

(d) Deposition occurs when a gas changes directly into a solid without first becoming a liquid. It is the inverse of sublimation. Due to the chilling effect, moisture in the gaseous phase is converted into frost (ice) in the solid phase (without passing through the liquid phase) in the freezer unit of the refrigerator. As a result, it is referred to as moisture deposition as frost.

As a result, the given state change is deposition.