Explain Change From Liquid to Gas – Phase change, Conversion, Examples

Many times question arises like – Liquid to gas is called, examples, Conversion, Phase change. let’s discuss one by one.

Matter exists in three physical states: solid, liquid, and gaseous state.

In solids, the molecules are closely packed. They have the least amount of intermolecular spaces. The force of attraction between the molecules is very strong and free movement of molecules is not possible. That is why solids are rigid and retain their shape.

In liquids, the molecules are loosely held. There are large intermolecular spaces in liquids than solids. The force of attraction between the molecules is small and movement of molecules is possible. That is why liquids are not rigid and have no shape of their own. They take the shape of the container.

In gases, the force of attraction between the molecules is the least and the molecules have maximum freedom of movement. Hence a gas has neither a definite shape nor a definite volume gases and liquids are called fluids because of their ability to flow

Let’s Understand the concept of the liquid state change to gas taking an example of water.

Water exists as a liquid and turns solid when kept in the refrigerator, and as steam ( or water vapour) out of the kettle of a boiling water. We can change the physical state of matter using two ways:

  • By changing the temperature.
  • By changing the pressure.

This results in the change of kinetic energy (or say) movement of particles.

Read Must: What is Matter?

Liquid to Gas Phase Change (Liquid to Gas Conversion)

Water normally exists in the liquid state. If we go on heating water the time will come it starts boiling.  Soon, liquid changes into gas(steam). Here, liquid water changes into the gas. So a change of state has taken place.

When we heat liquid particles starts moving. Heat energy makes particles to move even faster. At the boiling point, the particles have sufficient kinetic energy(motion). This kinetic energy overcomes the force of attraction holding them together. This will separate into individual particles and liquid boils to form a gas.

Change from Liquid to Gas

The boiling point of liquid changes with the force of attraction between the particles. Higher the boiling point greater will be the force of attraction. For example. the boiling point of Mercury is very high which tells us that force of attraction between the particles is very strong.

Why Does Water Boil at 100 degrees Celsius?

We heat water to a temperature of 100ºC. It changes into the gas. So the boiling point of water is 100ºC. The liquid (water) substance the particles attract one in the another with force. These forces of attraction hold the water particles together. In the liquid state, the heat which we supply to a water breaks the force of attraction. So, they become totally free.The heat supply changes Liquid state to gas does not increase the kinetic energy. Hence, no rise in temperature above 100 0C

Liquid to Gas is Called?

The process in which liquid substance changes into gas on heating we call as boiling.

The temperature at which liquid boils and changing into the gas we call as the boiling point of the liquid.

Gas to Liquid Phase Change

When we cool a gas by lowering its temperature then particles lose its kinetic energy. This result they start coming closer and being attracted to each other.This form the Liquid. The process through which gas changes to a liquid is called as condensation.

Liquid to Gas

Liquid to Gas Examples

The different liquids have different boiling points. The values remain same for the Gas to liquid Change. Few of them are listed below:

Substance Boiling Point(0C)
Water 100
Aluminium 2467
Iron 2212
Alcohol 78
Mercury 357

This is all about the basics of Liquid to gas conversion, examples, Phase change.

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