Chemistry Liquid to Gas | Google Science

Liquid to Gas: 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.

By increasing temperature (heating) liquid can be changed into the gaseous state (vapour state).

By decreasing temperature (cooling) gas can be changed into the liquid state.

Why Change of Liquid to Gas?

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.

Why Boiling point different for different substance?

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.

Liquid to Gas

Why does temperature of boiling point not rise above 100 degrees Celsius?

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 to gas does not increase the kinetic energy. Hence, no rise in temperature during the boiling point of water

Boiling and Boiling Point

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.

 We heat water to a temperature of 100ºC. It changes into the gas.So the boiling point of water is 100ºC. The different liquids have different boiling points. For example alcohol 78 ºC.The boiling point of Mercury is 357 ºC.

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