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Evaporation and Condensation

Evaporation is an endothermic process that is the conversion of a liquid to the vapor state by the addition of latent heat. Condensation is a type of chemical reaction in which water or another simple substance is released by the combination of two or more molecules. The term is also used to describe the process by which a gas or vapor changes to a liquid. In weather, evaporation occurs when water on the earth changes to water vapor and enters the atmosphere. The opposite of evaporation, condensation transforms water vapor in the atmosphere into a liquid, often resulting in precipitation, most commonly in the form of rain or snow.

2,794 Questions

What temperature must it be for water to condense?

Water condenses at temperatures 100*C or under
Water vapor at atmospheric pressure condenses at 100 degrees Centigrade or 212 degrees Fahrenheit.

Condensation occurs when a?

gas or vapor cools and turns back into a liquid. This process happens when the temperature of the gas decreases, causing the molecules to slow down and come closer together, forming droplets of liquid.

Use the kinetic theory to explain condensation?

In the kinetic theory, matter is made up of particles in constant motion. When a gas is cooled, its particles lose energy and slow down, allowing them to come closer together. This increased proximity increases the chances of intermolecular forces pulling the particles together, leading to the formation of a liquid through condensation.

Use the kinetic theory to explain evaporation?

In the kinetic theory, evaporation occurs when the molecules of a liquid gain enough kinetic energy to escape the attractive forces of neighboring molecules and enter the gas phase. As the liquid molecules absorb heat from their surroundings, they move faster and collide with greater force, increasing the likelihood of breaking free. This process leads to the liquid's overall cooling, as the higher-energy molecules leave, resulting in evaporation.

Evaporation is the opposite of?

Condensation. Evaporation is the process of liquid changing into a gas, while condensation is the process of gas changing into a liquid.

What is the difference between melting and evaporation?

Melting is the process of a solid turning into a liquid when heat is applied, while evaporation is the process of a liquid turning into a gas without heat being applied. Melting usually occurs at a specific temperature for each substance, while evaporation can occur at any temperature, as long as the liquid has enough energy to transition into a gas.

How can they make sure enough evaporation takes placeSuggest two different ways?

One way to ensure sufficient evaporation is to increase the surface area of the liquid by using a shallow container or spreading it out thinly. Another way is to increase air circulation around the liquid using a fan or by placing the container in a well-ventilated area.

Distillation and evaporation are methods to .?

Distillation is a method of separation for liquids.
Evaporation is a physical change, from liquid to gas.

What is difference between vapor pressure and vapor density?

Vapor pressure is the pressure exerted by a vapor in equilibrium with its condensed phase (liquid or solid) at a given temperature. Vapor density, on the other hand, is the mass of a vapor per unit volume of air. In essence, vapor pressure relates to the equilibrium between the vapor and its condensed phase, while vapor density pertains to the mass of vapor in a given volume of air.

What is a nonexample of evaporation?

An example of a nonexample of evaporation would be boiling water, as boiling involves the rapid vaporization of water at its boiling point, which is different from the slower process of evaporation.

When the evaporation rate equals the condensation rate the space above the liquid is?

When the evaporation rate equals the condensation rate, the space above the liquid is in a state of dynamic equilibrium, where molecules are constantly transitioning between the liquid and gas phases but there is no overall change in concentration.

Is Evaporation and condensation are both a type of vaporization?

Yes, both evaporation and condensation are types of vaporization. Evaporation is the process in which a liquid turns into a gas, whereas condensation is the process in which a gas turns back into a liquid. Both involve the conversion of a substance between its liquid and gaseous states.

What is the condensation point for propane?

The condensation point for propane is approximately -42 degrees Celsius (-43.6 degrees Fahrenheit). At this temperature, propane gas becomes a liquid.

Condensation is an important phase change that commonly occurs in the atmosphere. suppose a 1-m3 sample of air at sea-level pressure containing 4 g of water vapor was cooled such that all 4 g condense?

The 4 g of water vapor in the 1 m3 sample of air will condense into liquid water when cooled. This phase change releases latent heat energy to the surroundings. The final state will be a mixture of dry air and liquid water in equilibrium.

What type of phase change is evaporation?

Evaporation is a phase change from liquid to gas, where molecules at the surface of a liquid gain enough energy to escape into the gas phase.

What are the three things needed for condensation to occur?

Condensation occurs when the air is saturated with water vapor, the air cools down, and there are surfaces for the water vapor to condense on.

Why is a condensation nuclei important?

Condensation nuclei are important in the atmosphere because they provide a surface for water vapor to condense onto, forming clouds and precipitation. Without condensation nuclei, it would be more difficult for clouds to form and for precipitation to occur.

Is condensation a energy loss or gain?

Condensation is typically considered an energy loss because it releases energy as heat when water vapor changes to liquid water. This energy is known as latent heat of condensation.

Is evaporation energy loss or gain?

Evaporation is considered an energy gain process because it requires energy input to break the bonds between liquid molecules to change them into vapor. This energy input comes from the surrounding environment, which leads to cooling of the remaining liquid.

How are evaporation and transformation different?

Evaporation is a phase change process in which a liquid turns into a gas at the surface of the liquid, while transformation refers to a change in the structure or composition of a substance, such as in chemical reactions or physical changes. Evaporation typically involves only a change in state, while transformation can involve various changes beyond state, such as chemical composition or physical properties.

Relationship between evaporation and relative humidity?

Evaporation is the process by which a liquid turns into a gas, while relative humidity is the ratio of the amount of water vapor present in the air compared to the maximum amount the air can hold at a specific temperature. A higher relative humidity means the air is already holding a lot of water vapor and so evaporation will be slower, while a lower relative humidity allows for faster evaporation as the air has more capacity to hold additional water vapor.

What are 3 examples of condensation?

when we take a bath the mirror has on it some gas, the steam on the sauna, and maybe fire

How is transpiration and evaporation different?

Transpiration is the process by which moisture is released by plants through their leaves, while evaporation is the process by which water is converted from liquid to vapor from sources such as bodies of water or wet surfaces. Both processes contribute to the water cycle by adding moisture to the atmosphere, but transpiration is specific to plants while evaporation can occur from any surface holding water.