`color{green}(โข)` The process of conversion of liquid to gas due to escaping of particles from liquid surface is called evaporation.
`color{green}(โข)` It takes place only at the surface of liquid.
`color{green}(โข)` It can take place at room temperature also.
`color{green}("๐
๐๐๐๐๐๐ ๐๐
๐
๐๐๐๐๐๐ ๐๐๐๐ ๐๐
๐๐๐๐๐๐๐๐๐๐๐:")`
`color{red}("๐ ๐๐๐๐
๐๐๐ ๐๐๐๐")`
Evaporation being the surface phenomena increases with increase in surface area.For eg: wet clothes are spread out so that with increase in surface area evaporation takes place faster and clothes become dry up quickly.
`color{red}("๐ ๐๐๐๐๐๐๐๐๐๐๐")`
Evaporation increases with increase in temperature. This is because as the temperature is increased the particles present at the surface get the required kinetic energy so that they can overcome the force of attraction and escape quickly in air
`color{red}("๐ ๐๐๐๐๐๐๐๐")`
Humidity is the amount of water vapour present in air. The air around us cannot hold more than a definite amount of water vapour at a given temperature. If the amount of water in air is already high, the rate of evaporation decreases. Therefore evaporation decreases with increase in humidity in surroundings.
`color{red}("๐ ๐๐๐๐ ๐๐๐๐๐")`
With the increase in wind speed, the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding. Therefore evaporation increases with wind speed.
`color{green}("๐๐๐๐๐๐๐ ๐๐
๐
๐๐๐๐ ๐๐
๐๐๐๐๐๐๐๐๐๐๐:")`
`color{green}(โข)` In an open vessel, the liquid keeps on evaporating. The particles of liquid absorb energy from the surrounding to regain the energy lost during evaporation. This absorption of energy from the surroundings make the surroundings cold.
`color{green}(โข)` When we pour some acetone over our palm then the particles gain energy from our palm or surroundings and evaporate causing the palm to feel cool.
`color{green}(โข)` After a hot sunny day, people sprinkle water on the roof or open ground because the large latent heat of vaporisation of water helps to cool the hot surface.
`color{green}(โข)` During evaporation, the particles at the surface of the liquid gain energy from the surroundings or body surface and change into vapour. The heat energy equal to the latent heat of vaporisation is absorbed from the body leaving the body cool. Cotton, being a good absorber of water helps in absorbing the sweat and exposing it to the atmosphere for easy evaporation.
`color{green}(โข)` Let us take some ice-cold water in a tumbler droplets of water are seen on the outer surface of the tumbler. This is because the water vapour present in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which can be seen as water droplets.
`color{green}(โข)` The process of conversion of liquid to gas due to escaping of particles from liquid surface is called evaporation.
`color{green}(โข)` It takes place only at the surface of liquid.
`color{green}(โข)` It can take place at room temperature also.
`color{green}("๐
๐๐๐๐๐๐ ๐๐
๐
๐๐๐๐๐๐ ๐๐๐๐ ๐๐
๐๐๐๐๐๐๐๐๐๐๐:")`
`color{red}("๐ ๐๐๐๐
๐๐๐ ๐๐๐๐")`
Evaporation being the surface phenomena increases with increase in surface area.For eg: wet clothes are spread out so that with increase in surface area evaporation takes place faster and clothes become dry up quickly.
`color{red}("๐ ๐๐๐๐๐๐๐๐๐๐๐")`
Evaporation increases with increase in temperature. This is because as the temperature is increased the particles present at the surface get the required kinetic energy so that they can overcome the force of attraction and escape quickly in air
`color{red}("๐ ๐๐๐๐๐๐๐๐")`
Humidity is the amount of water vapour present in air. The air around us cannot hold more than a definite amount of water vapour at a given temperature. If the amount of water in air is already high, the rate of evaporation decreases. Therefore evaporation decreases with increase in humidity in surroundings.
`color{red}("๐ ๐๐๐๐ ๐๐๐๐๐")`
With the increase in wind speed, the particles of water vapour move away with the wind, decreasing the amount of water vapour in the surrounding. Therefore evaporation increases with wind speed.
`color{green}("๐๐๐๐๐๐๐ ๐๐
๐
๐๐๐๐ ๐๐
๐๐๐๐๐๐๐๐๐๐๐:")`
`color{green}(โข)` In an open vessel, the liquid keeps on evaporating. The particles of liquid absorb energy from the surrounding to regain the energy lost during evaporation. This absorption of energy from the surroundings make the surroundings cold.
`color{green}(โข)` When we pour some acetone over our palm then the particles gain energy from our palm or surroundings and evaporate causing the palm to feel cool.
`color{green}(โข)` After a hot sunny day, people sprinkle water on the roof or open ground because the large latent heat of vaporisation of water helps to cool the hot surface.
`color{green}(โข)` During evaporation, the particles at the surface of the liquid gain energy from the surroundings or body surface and change into vapour. The heat energy equal to the latent heat of vaporisation is absorbed from the body leaving the body cool. Cotton, being a good absorber of water helps in absorbing the sweat and exposing it to the atmosphere for easy evaporation.
`color{green}(โข)` Let us take some ice-cold water in a tumbler droplets of water are seen on the outer surface of the tumbler. This is because the water vapour present in air, on coming in contact with the cold glass of water, loses energy and gets converted to liquid state, which can be seen as water droplets.