Difference Wiki

Evaporation vs. Boiling: What's the Difference?

Edited by Sawaira Riaz || By Sumera Saeed || Updated on October 25, 2023
Evaporation is a surface phenomenon occurring at any temperature, while boiling happens throughout a liquid at its boiling point.

Key Differences

Evaporation is the process where molecules at the surface of a liquid gain enough energy to change into a gaseous state without the liquid reaching its boiling point. Boiling, on the other hand, is when the entire liquid reaches a temperature where its molecules have enough energy to transition into a gas.
Sumera Saeed
Oct 23, 2023
Evaporation generally occurs slowly and is a surface phenomenon. This means it only involves the molecules present at the surface of the liquid. Boiling is a bulk process that involves the entire volume of the liquid, where bubbles of vapor form and rise to the surface.
Sumera Saeed
Oct 23, 2023
Evaporation can take place at any temperature, even if it's below the boiling point of the liquid. This is because some molecules in a liquid have higher kinetic energy and can escape the liquid's surface. Boiling strictly occurs when the liquid reaches its specific boiling point, a temperature at which its vapor pressure equals the atmospheric pressure.
Sumera Saeed
Oct 23, 2023
The process of evaporation does not necessarily require an external source of heat. It often happens due to the surrounding environment, like the sun warming up a puddle of water. Boiling typically requires an external source of heat to raise the temperature of the liquid to its boiling point.
Sara Rehman
Oct 23, 2023
Evaporation usually results in cooling of the liquid, as the most energetic molecules escape. Boiling, in contrast, involves the input of heat without a change in temperature, as all the energy goes into changing the liquid to a gas without raising its temperature further.
Sara Rehman
Oct 23, 2023
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Comparison Chart

Process

Surface phenomenon
Bulk process
Sumera Saeed
Oct 23, 2023

Temperature

Can occur below boiling point
Occurs at boiling point
Sumera Saeed
Oct 23, 2023

Speed

Generally slow
Rapid with bubble formation
Sumera Saeed
Oct 23, 2023

Heat Source

Not always external
Typically requires external heat
Janet White
Oct 23, 2023

Cooling Effect

Cools the remaining liquid
No cooling, energy goes to phase change
Aimie Carlson
Oct 23, 2023
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Evaporation and Boiling Definitions

Evaporation

Evaporation is the process of a liquid turning into vapor without boiling.
After the rain, the puddles underwent evaporation and disappeared.
Sawaira Riaz
Oct 23, 2023

Boiling

Boiling requires an external heat source to achieve the boiling point.
He turned on the stove to initiate the boiling of the soup.
Janet White
Oct 23, 2023

Evaporation

Evaporation occurs when molecules acquire enough energy to become vapor.
The heat from the sun causes evaporation of the ocean's surface.
Sara Rehman
Oct 23, 2023

Boiling

Boiling is the vigorous vaporization of a liquid when it heats to its boiling point.
She was waiting for the water to start boiling before adding the pasta.
Sawaira Riaz
Oct 23, 2023

Evaporation

Evaporation results in the cooling of the remaining liquid.
As evaporation took place, the bowl of water felt cooler to touch.
Sumera Saeed
Oct 23, 2023

Boiling

Boiling is the phase transition from a liquid to a gaseous state at a specific temperature.
The boiling of water occurs at 100°C at sea level.
Aimie Carlson
Oct 23, 2023

Evaporation

Evaporation can happen at any temperature below a liquid's boiling point.
Despite the cold weather, evaporation from the lake was evident.
Janet White
Oct 23, 2023

Boiling

Boiling involves the formation of bubbles throughout the liquid.
When boiling, the bubbles in the pot indicated it was ready for cooking.
Sumera Saeed
Oct 23, 2023

Evaporation

Evaporation is a surface phenomenon where molecules escape from the liquid's surface.
Due to evaporation, the water level in the glass reduced over time.
Sumera Saeed
Oct 23, 2023

Boiling

Boiling is a bulk process involving the entire volume of the liquid.
The boiling kettle whistled, signaling it was time for tea.
Sumera Saeed
Oct 23, 2023

Evaporation

To convert or change into a vapor.
Sumera Saeed
May 12, 2020

Boiling

Heated to or past the boiling point
A kettle of boiling water.
Sumera Saeed
May 12, 2020

FAQs

What is evaporation?

Evaporation is the process of a liquid turning into vapor without reaching its boiling point.
Sumera Saeed
Oct 23, 2023

What is boiling?

Boiling is the vaporization of a liquid when it reaches its specific boiling point.
Sawaira Riaz
Oct 23, 2023

Why don't we see bubbles during evaporation?

Because evaporation is a surface phenomenon, and bubbles form during boiling due to vaporization within the bulk liquid.
Sumera Saeed
Oct 23, 2023

Why is boiling considered a rapid process?

Because boiling involves the entire volume of the liquid and the formation of many vapor bubbles simultaneously.
Harlon Moss
Oct 23, 2023

Can we slow down the rate of evaporation?

Yes, by reducing the surface area, lowering the temperature, or increasing humidity.
Sumera Saeed
Oct 23, 2023

Can evaporation occur at any temperature?

Yes, evaporation can occur below the boiling point of the liquid.
Sumera Saeed
Oct 23, 2023

Is evaporation a slow process?

Generally, yes, evaporation is a slower process compared to boiling.
Janet White
Oct 23, 2023

Does boiling produce bubbles?

Yes, boiling results in the formation of vapor bubbles throughout the liquid.
Sumera Saeed
Oct 23, 2023

Why does evaporation cool the remaining liquid?

Evaporation involves the escape of the most energetic molecules, leaving behind cooler ones.
Aimie Carlson
Oct 23, 2023

Does saltwater have the same boiling point as pure water?

No, adding salt raises the boiling point of water slightly, a phenomenon known as boiling point elevation.
Harlon Moss
Oct 23, 2023

Does boiling only occur at the boiling point?

Yes, boiling occurs when a liquid reaches its specific boiling point.
Sumera Saeed
Oct 23, 2023

Do both evaporation and boiling result in a gaseous state?

Yes, both processes result in the transformation of a liquid to a gaseous state.
Sumera Saeed
Oct 23, 2023

Does boiling water always mean it's at 100°C?

No, the boiling point of water varies with atmospheric pressure; at sea level, it's 100°C.
Aimie Carlson
Oct 23, 2023

How does altitude affect boiling and evaporation?

Higher altitudes have lower atmospheric pressure, which can lower the boiling point of liquids but doesn't significantly change the nature of evaporation.
Sumera Saeed
Oct 23, 2023

Is the boiling point the same for all liquids?

No, different liquids have different boiling points depending on their molecular structure and atmospheric pressure.
Janet White
Oct 23, 2023

Is evaporation a surface or bulk phenomenon?

Evaporation is a surface phenomenon, involving only the molecules at the liquid's surface.
Sumera Saeed
Oct 23, 2023

Can a liquid evaporate in a closed container?

Yes, but it will reach an equilibrium where the rate of evaporation equals the rate of condensation.
Harlon Moss
Oct 23, 2023

Is boiling a surface or bulk phenomenon?

Boiling is a bulk process, involving the entire volume of the liquid.
Aimie Carlson
Oct 23, 2023

Can boiling and evaporation occur simultaneously?

Yes, while a liquid is boiling, evaporation can still occur at its surface.
Harlon Moss
Oct 23, 2023

Do I always need an external heat source for evaporation?

No, evaporation can occur due to the surrounding environment without an external heat source.
Aimie Carlson
Oct 23, 2023
About Author
Written by
Sumera Saeed
Sumera is an experienced content writer and editor with a niche in comparative analysis. At Diffeence Wiki, she crafts clear and unbiased comparisons to guide readers in making informed decisions. With a dedication to thorough research and quality, Sumera's work stands out in the digital realm. Off the clock, she enjoys reading and exploring diverse cultures.
Edited by
Sawaira Riaz
Sawaira is a dedicated content editor at difference.wiki, where she meticulously refines articles to ensure clarity and accuracy. With a keen eye for detail, she upholds the site's commitment to delivering insightful and precise content.

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