During boiling the entire volume of the liquid is involved.
Boiling occur in the entire volume of a liquid.
Boiling is a bulk phenomenon because it involves the change of state of a large number of molecules in a substance from liquid to gas. It occurs throughout the entire volume of the substance, rather than just on the surface. This mass conversion from liquid to gas is what characterizes boiling as a bulk phenomenon.
Evaporation is considered a surface phenomenon because it occurs only at the surface of a liquid, where molecules gain enough energy to escape into the gas phase without the need for the entire liquid to reach a specific temperature. In contrast, boiling is a bulk phenomenon because it involves the formation of vapor bubbles throughout the entire volume of the liquid, requiring the temperature to reach the boiling point, leading to a rapid transition from liquid to gas. Thus, evaporation is localized, while boiling affects the entire body of the liquid.
boiling point?!?
Boiling occurs in bulk and at the boiling point; all of the liquid is hot enough that any additional energy will cause it to become a gas. Evaporation occurs at the surface and at a temperature under the boiling point, because only at the surface can the hotter components of the atomic or (usually) molecular components of the liquid escape from the liquid, when most of the liquid is not hot enough to change into the gas phase.
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The degree to make boiling point
Boiling occur in the entire volume of a liquid.
Boiling is known as a bulk phenomenon because it involves the transformation of an entire volume of liquid into vapor as a result of reaching a specific temperature called the boiling point. The process occurs throughout the liquid, not just at the surface, making it a bulk or macroscopic change.
Evaporation occurs at the surface of a liquid, where molecules gain enough energy to escape into the gas phase. Boiling, on the other hand, happens throughout the bulk of the liquid when the vapor pressure of the liquid equals the atmospheric pressure, leading to the formation of bubbles that rise to the surface. This difference in mechanisms accounts for why evaporation is considered a surface phenomenon and boiling a bulk phenomenon.
Boiling is a bulk phenomenon because it involves the change of state of a large number of molecules in a substance from liquid to gas. It occurs throughout the entire volume of the substance, rather than just on the surface. This mass conversion from liquid to gas is what characterizes boiling as a bulk phenomenon.
The two main types of vaporization are evaporation, which occurs at the surface of a liquid at any temperature, and boiling, which occurs throughout the bulk of a liquid at a specific temperature called the boiling point.
Vaporization that occurs below the liquid surface at its boiling point is called nucleate boiling. It happens when bubbles of vapor form in the bulk liquid due to intense heating or agitation. Nucleate boiling is an efficient method of heat transfer commonly used in industrial processes such as boiling water in a kettle.
Evaporation is considered a surface phenomenon because it occurs only at the surface of a liquid, where molecules gain enough energy to escape into the gas phase without the need for the entire liquid to reach a specific temperature. In contrast, boiling is a bulk phenomenon because it involves the formation of vapor bubbles throughout the entire volume of the liquid, requiring the temperature to reach the boiling point, leading to a rapid transition from liquid to gas. Thus, evaporation is localized, while boiling affects the entire body of the liquid.
boiling point?!?
The temperature at which a liquid boils is called its boiling point.
Boiling occurs in bulk and at the boiling point; all of the liquid is hot enough that any additional energy will cause it to become a gas. Evaporation occurs at the surface and at a temperature under the boiling point, because only at the surface can the hotter components of the atomic or (usually) molecular components of the liquid escape from the liquid, when most of the liquid is not hot enough to change into the gas phase.