The difference between boiling and evaporation is:a)Evaporation occurs...
Introduction:
Boiling and evaporation are both processes that involve the conversion of a liquid into a gas. Although they may seem similar, there are some key differences between the two.
Difference between boiling and evaporation:
1. Temperature:
- Boiling: Boiling occurs at a specific temperature known as the boiling point of the liquid. This temperature is different for different liquids. For example, water boils at 100 degrees Celsius at sea level.
- Evaporation: Evaporation, on the other hand, can occur at any temperature below the boiling point of the liquid. It is a slower process that happens gradually as the liquid particles gain enough energy to escape into the air.
2. Process:
- Boiling: Boiling is a rapid process in which bubbles of vapor form within the liquid and rise to the surface. This happens when the temperature of the liquid reaches its boiling point.
- Evaporation: Evaporation occurs when the liquid particles at the surface gain enough kinetic energy to escape into the air as vapor. It happens at the surface of the liquid and does not involve the formation of bubbles.
3. Heat Source:
- Boiling: Boiling requires the addition of heat to the liquid from an external source, such as a stove or a flame. The heat causes the liquid to reach its boiling point and undergo a phase change.
- Evaporation: Evaporation can occur without the addition of external heat. It happens naturally as the liquid particles gain energy from their surroundings, such as sunlight or room temperature.
4. Occurrence:
- Boiling: Boiling occurs throughout the liquid, as the heat is evenly distributed and reaches all parts of the liquid. This is why bubbles form throughout the liquid during boiling.
- Evaporation: Evaporation occurs only at the surface of the liquid. The liquid gradually reduces in volume as the surface particles escape as vapor, but the bulk of the liquid remains unaffected.
Summary:
In summary, the main difference between boiling and evaporation is that boiling occurs at a specific temperature (boiling point) and requires the addition of external heat, while evaporation can occur at any temperature below the boiling point and does not necessarily require external heat. Boiling is a rapid process that involves the formation of bubbles throughout the liquid, while evaporation is a slower process that occurs only at the surface of the liquid.
To make sure you are not studying endlessly, EduRev has designed Class 5 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 5.