What is evaporation in chemistry class 9?

Evaporation is the process of changing the state of water from liquid to gaseous or vapour.

What is the definition of evaporation in chemistry?

Evaporation is the process by which a liquid turns into a gas. It is also one of the three main steps in the global water cycle.

What is evaporation and example?

Evaporation is defined as the process of a liquid changing into a gas. An example of evaporation is water turning into steam.

What is evaporation method?

In evaporation methods, a substance is heated and vaporized. The vapor is then cooled by some method and condensed into UFPs. A representative method is evaporation in an inert gas atmosphere and is referred to as gas evaporation method.

What is the process of evaporation called?

In hydrology, evaporation and transpiration (which involves evaporation within plant stomata) are collectively termed evapotranspiration. Evaporation of water occurs when the surface of the liquid is exposed, allowing molecules to escape and form water vapor; this vapor can then rise up and form clouds.

What is evaporation very short question answer?

Evaporation is a process where liquid changes into a gas below the temperature at which it boils. When water gains heat energy it changes to a gas. An increase in temperature speeds up the rate of evaporation.

What is evaporation Class 9 Example?

The process of a liquid changing into vapour (or gas) even its boiling point is called evaporation. The wet clothes dry due to evaporation of water present in them. Common salt is also recovered from sea-water by the process of evaporation.

What is evaporation and its factors?

Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. The rate of evaporation is affected by, (1) Temperature: Evaporation increases with an increase in temperature. (2) Surface Area: Evaporation increases with an increase in surface area.

What are 5 examples of evaporation?

  • Ironing Clothes. Have you ever noticed that ironing slightly damp clothes works best to get the wrinkles out?
  • Glass of Water.
  • Process of Sweating.
  • Line Drying Clothes.
  • Kettle Whistle.
  • Drying of Wet Tables.
  • Drying of a Mopped Floor.
  • Melting a Glass of Ice.

What is the best example of evaporation?

Drying clothes in the sun is one of the most common examples of evaporation. The water present in the clothes when they are washed (and hung on the line) is removed by the evaporation process.

What are the 10 examples of evaporation?

  • Drying Clothes under The Sun.
  • Ironing of Clothes.
  • Cooling Down of Hot Tea and Other Hot Liquids.
  • Wet Floors.
  • Melting of Ice Cubes.
  • Preparation of Common Salt.
  • Evaporation of Nail Paint Remover.
  • Drying of Wet Hair.

What is the unit of evaporation?

Units. The evapotranspiration rate is normally expressed in millimetres (mm) per unit time. The rate expresses the amount of water lost from a cropped surface in units of water depth. The time unit can be an hour, day, decade, month or even an entire growing period or year.

What are the types of evaporation?

  • Natural/forced circulation evaporator.
  • Falling film evaporator.
  • Rising film (Long Tube Vertical) evaporator.
  • Climbing and falling-film plate evaporator.
  • Multiple-effect evaporators.
  • Agitated thin film evaporators.

What is used to measure evaporation?

An atmometer or evaporimeter is a scientific instrument used for measuring the rate of water evaporation from a wet surface to the atmosphere.

What is evaporation in short form?

evaporation, process by which an element or compound transitions from its liquid state to its gaseous state below the temperature at which it boils; in particular, the process by which liquid water enters the atmosphere as water vapour in the water cycle. evaporation.

Who discovered evaporation?

Nils Wallerius (1 January 1706 – 16 August 1764) was a Swedish physicist, philosopher and theologian. He was one of the first scientists to study and document the characteristics of evaporation through modern scientific methods.

What is the importance of evaporation?

Answer and Explanation: Evaporation is an essential part of the water cycle because it allows large amounts of water to move from bodies of water on Earth up into the atmosphere. Water vapor in the atmosphere condenses into clouds, which move around the globe and release precipitation.

What is difference between evaporation and boiling?

Evaporation is a normal process that occurs when the liquid form changes into the gaseous form; while causing an increase in the pressure or temperature. Boiling is an unnatural process where the liquid gets heated up and vaporized due to continuous heating of the liquid.

What is evaporation temperature?

Evaporation is the process by which water changes from a liquid to a gas or vapor. Water boils at 212 degrees F (100 degrees C), but it actually begins to evaporate at 32 degrees F (0 degrees C); it just occurs extremely slowly. As the temperature increases, the rate of evaporation also increases.

What increases evaporation?

Although water can evaporate at low temperatures, the rate of evaporation increases as the temperature increases. This makes sense because at higher temperatures, more molecules are moving faster; therefore, it is more likely for a molecule to have enough energy to break away from the liquid to become a gas.

What are the 4 factors that affect the rate of evaporation?

  • Temperature: On increasing the temperature the rate of evaporation also increases.
  • Wind speed: Wind speed and rate of evaporation are directly proportional to each other.
  • Surface area: As the surface area increases, the rate of evaporation also increases.
  • Humidity:

What are the five factors affecting evaporation?

  • Temperature.
  • Surface Area Occupied by the Liquid.
  • Humidity of the Surrounding.
  • Air Circulation or Wind Speed.

Is boiling water evaporation?

When water is heated it evaporates, which means it turns into water vapor and expands. At 100℃ it boils, thus rapidly evaporating. And at boiling point, the invisible gas of steam is created. The opposite of evaporation is condensation, which is when water vapor condenses back into tiny droplets of water.

What are the 2 types of evaporation?

There are two types of vaporization: evaporation and boiling.

What are the two agents of evaporation?

In general, evaporation processes can be expressed as: The separating agent is heat, which is usually supplied by a low-pressure steam to provide the latent heat of vaporization. When the liquid, say, a water solution, is heated, boiling occurs at the heated surface and the liquid circulates.

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