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GATE 2026 Exam Date Announced – Complete Schedule, Syllabus, and Key Details » GATE Study Materials » Chemical Engineering » Condensation and Evaporation
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Condensation and Evaporation

What is Condensation? What is Evaporation? What are condensation and Evaporation examples? Learn everything easy and descriptive about condensation and Evaporation.

Table of Content
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Condensation and Evaporation are when a liquid turns into a gas, or gas turns into liquid. Condensation can happen when water vapour condenses to form rain, fog, or snow.

Condensation is when molecules of a liquid come together to form small droplets (tiny drops). Evaporation is when gas molecules come together to form small droplets (tiny drops). The difference between these two processes is that there is no change in temperature in condensation, whereas there is an increase in temperature in Evaporation. Evaporation is the process of a liquid turning into a vapour without boiling or condensing to a liquid state.

Condensation

Condensation is the process of reducing the amount of fluid in a substance by Evaporation and subsequent cooling. Condensation changes a gas into a liquid by adding enough heat energy. Condensation is possible when the vapour pressure is higher than its saturation pressure. Condensation happens when the vapour pressure is higher than its saturation pressure. Vaporisation occurs when the ambient temperature changes, resulting in heat energy being added to molecules in the gas phase, and then they change phase into a liquid or solid.

Condensation is a form of deposition, a physical process that transfers energy from one state to another. Condensation can occur when heat causes the vapour in the air to change into liquid water or ice. When it becomes too cold outside, water vapour in the air will condense into liquid droplets and fall as precipitation. Condensation is an essential part of our everyday life as it helps us maintain humidity levels in our homes and offices. It also helps create rainbows and snowflakes during wintertime or on rainy days.

Evaporation

Evaporation is a phase change from liquid to gas. As water evaporates, it changes from a liquid to a gas. Evaporation is changing the state of matter from liquid to gas. It is usually achieved by heating or cooling the substance until it reaches its vapour pressure and then escaping into the surrounding air or other substances. Evaporation is how water turns into vapour and how we cool our homes on hot days without turning them into ice cubes. The principle of Evaporation states that when a liquid evaporates, the vapour molecules move away from the liquid. Evaporation has many uses in science, industry and everyday life. In addition to cooling our homes during summertime, it also provides us with fresh air for breathing and helps us grow plants and crops.

The causes of Evaporation are:

· Evaporation can happen when a liquid is heated above its boiling point, causing its molecules to start moving faster and faster and eventually break free of the surface tension

· When a liquid evaporates, it leaves behind vapour molecules in the gaseous phase

· A liquid evaporates faster in lower temperatures than at higher temperatures because vapour molecules have less kinetic energy at lower temperatures

Condensation and Evaporation

Condensation is a process where molecules from one gas or liquid come together to form another substance (typically liquid), while Evaporation is when molecules leave a sense to create gas or vapour.

There are many examples of condensation, including:

· raindrops evaporating and condensing on cold surfaces

· boiling water turning into steam and then condensing on cold surfaces

· the mixing of chemicals in the solution that results in water

· When water evaporates in the air, it condenses to form clouds and rain

· When salt and sugar mix, they form a crystalline solid called table sugar (sucrose)

Evaporation happens when heat energy evaporates liquid to become gas (water vapour). As the temperature drops, water vapour turns into liquid water. When it gets colder still, it turns into ice crystals. Condensation happens when water vapour in the air meets the cold surface on earth or water droplets on the surface meet cold air.

Evaporation Examples:

· Evaporation of saltwater in the oceans

· Evaporation of sweat on your skin

· Evaporation of water from the soil

We can explain more about condensation and evaporation by the following experiment.

In this experiment, the Evaporation of water is observed in a sealed container. The container had a lid and was filled with ice. The water in the container evaporated at the top and condensed at the bottom, generating an ice coating on top. The temperature rose as more water evaporated until it reached its boiling point at 100 degrees Celsius.

As temperature rises, the pressure in an enclosed space causes vaporisation, leading to condensation. Condensation can be used with dehumidifiers or air conditioners to control humidity levels in buildings or vehicles.

Conclusion

Condensation and Evaporation are two processes that happen in nature. Condensation happens when water molecules form an aggregate called an ice crystal. The temperature change causes the vapour to condense and fall to earth as snow or rain. On the other hand, Evaporation happens when water molecules leave their aggregate and go back to their original state vapour again, where they can enter into another system such as our lungs or plants. Both condensation and Evaporation are essential for life because they help regulate body temperature and keep us hydrated in hot weather or dry us off from rain.

 
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Get answers to the most common queries related to the Gate Examination Preparation.

What is the difference between Evaporation and condensation?

Evaporation is the process of losing heat or water vapour from a liquid or a gas. Condensation is the process of tur...Read full

How does boiling water turn into steam?

Boiling water turns into steam when it is heated to a certain temperature. This process happens when water molecules...Read full

Evaporation is the process of losing heat or water vapour from a liquid or a gas. Condensation is the process of turning a vapour into a liquid. The difference between Evaporation and condensation is that Evaporation is the process of losing heat or water vapour from a liquid or gas. In contrast, condensation turns vapour into a liquid.

Boiling water turns into steam when it is heated to a certain temperature. This process happens when water molecules break apart, and the oxygen atoms are released into the air.

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