The natural process showing the interconversion of the states of water is called
Answers
Answer:
evapouration
Explanation:
The process where a liquid changes into vapor at any temperature below its boiling point is evaporation. Evaporation is a surface phenomenon. i.e evaporation takes place at the surface of the liquid.
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Extra information
Matter can change from one form to other form i.e from solids to liquids to gases.
The phenomenon of the change of matter from one state to another and back to original state is known as interconversion of the sates of matter.
Matter can be changed from one state to another by changing temperature or pressure.
Change in state of water
When heat energy is supplied to ice it changes into water and then to vapor. If we cool the steam it gets converted into water and further cooling of water changes into ice.
Here the heat energy is used up in changing the state of matter. the heat is used to increase the kinetic energy of the particles of ice to such an extent that they break away from the rigid lattice structure of the solid form, ice, and move around freely to form the liquid form, water. So, until all the ice has melted, the heat absorbed does not raise the temperature of the ice-water mixture. In the same way the temperature does not change while a liquid is boiling.
Evaporation
The process where a liquid changes into vapor at any temperature below its boiling point is evaporation .Evaporation is a surface phenomenon. i.e evaporation takes place at the surface of the liquid.
Factors affecting evaporation
Surface area
Temperature
Humidity and
Wind speed.
Rate of evaporation - Surface area
The rate of evaporation increases with an increase of surface area. When the surface area is more, evaporation will be faster.
For example shallow quarries or bunds are built near the sea. The shallow bunds provide a relatively large surface area for water to evaporate quickly, Water from these bunds evaporates, leaving salt behind. Then the salt is collected and refined before use.
Rate of evaporation - Temperature
The rate of evaporation increases with an increase of temperature.
Cloths dry faster on a sunny day than on a cloudy day
Rate of evaporation - Effect of Humidity
The rate of evaporation increases with decrease in humidity.
Rate of evaporation - Effect of Wind
The rate of evaporation increases with an increase in wind speed.
The water vapor particles in atmosphere move away with the winds. This results in a decrease of the amount of water vapor in the surroundings. Due to this reason, clothes dry faster on a windy day than a normal day.
Evaporation cause cooling
During the process of evaporation, the particles of liquid absorb energy from the surroundings, to regain energy lost during evaporation. This absorption of energy from the surroundings makes the surroundings cold.
Differences between boiling and evaporation
Boiling
Evaporation
It is a rapid process.
It is a slow process.
It is takes place at the entire mass of the liquid.
It takes place at the surface of the liquid.
It takes place at specific temperature called the boiling point of the liquid.
It takes place at any temperature.
The temperature of the liquid remains constant during boiling process.
It causes cooling i.e the substance becomes cool due to evaporation.
Condensation
The process where vapor changes to a liquid is called condensation.
Example: The water vapor condenses and we receive the same water in the form of rain.
When you pour cold water in a glass. You will observe the formation of water droplets on the outer surface of the glass . This is due to the condensation of water vapor present in atmosphere.