# What happens to liquid when they are cooled?

## What happens to liquid when they are cooled?

Freezing occurs when a liquid is cooled and turns to a solid. Eventually the particles in a liquid stop moving about and settle into a stable arrangement, forming a solid. This is called freezing and occurs at the same temperature as melting.

### Why do materials contract when cooled?

When it is cold the kinetic energy decreases, so the atoms take up less space and the material contracts. Some metals expand more than others due to differences in the forces between the atoms / molecules.

How does cold temperature affect liquids?

Note how temperature effects the motion of the atoms or molecules in a liquid. As the temperature of a solid, liquid or gas increases, the particles move more rapidly. As the temperature falls, the particles slow down. If a liquid is cooled sufficiently, it forms a solid.

Do liquids contract when cooled?

Most liquids have a quite simple behavior when they are cooled (at a fixed pressure): they shrink. The liquid contracts as it is cooled; because the molecules are moving slower they are less able to overcome the attractive intermolecular forces drawing them closer to each other.

## Which contracts most when cooled?

Most materials contract on cooling. The notable exception to the rule are some phase transitions and water. But even ice contracts on cooling. Water expands on cooling only between 0∘C and 4∘C (including phase transition).

### How does the temperature affect liquids?

In general, the liquids tend to expand when their temperature increases. For example, the same mass of boiling water occupies more volume at 100 degrees Celsius than at 20 degrees Celsius. Therefore, increasing temperature decreases density.

When water freezes does it contract or expand?

When liquid water is cooled, it contracts like one would expect until a temperature of approximately 4 degrees Celsius is reached. After that, it expands slightly until it reaches the freezing point, and then when it freezes it expands by approximately 9%.

Do all liquids expand when freezing?

Actually, most liquids do /not/ expand when they freeze. In fact, most liquids lose volume as they freeze. This is because when you freeze a liquid, its molecules slow down. When the individual molecules become closer together, the substance will take up less space.

## Why does water not freeze at 0 degrees?

When dissolved in water, the water molecules tend to stick to the salt ions instead of to each other, and they therefore don’t freeze as readily. As you add more salt to water, its freezing point continues to drop until the water reaches saturation and cannot hold any more salt.

### Can water freeze above 0 degrees?

We’ve all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 273.15 Kelvin. That’s not always the case, though. Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab.

Why do water expands on cooling?

On heating, liquids expand since the molecules move with greater energy overcoming the intermolecular attraction. On the contrary, liquids usually contract on cooling. It is because the molecules move slower and are not able to overcome the force of attraction between them.