In which type of boiling the temperature of the liquid exceeds the sat...
The vapor bubbles generated at the solid surface are transported through the liquid by buoyancy effects and eventually escape from the surface.
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In which type of boiling the temperature of the liquid exceeds the sat...
Explanation:
Boiling is a phase transition from the liquid phase to the vapor phase that occurs when the vapor pressure of the liquid equals or exceeds its atmospheric pressure. Boiling can occur in various types, including forced boiling, natural boiling, pool boiling, and saturated boiling.
Saturated boiling is a type of boiling where the temperature of the liquid exceeds its saturation temperature. The saturation temperature is the temperature at which a liquid boils at a given pressure. In saturated boiling, the liquid is already at its boiling point, but due to external heating or pressure conditions, the temperature of the liquid exceeds the saturation temperature. This can happen in certain conditions, such as:
- High pressure: When the pressure on the liquid is increased significantly, the saturation temperature also increases. If the liquid is heated beyond this increased saturation temperature, it will enter the saturated boiling region.
- Superheating: Superheating occurs when the liquid is heated above its boiling point without boiling. In this case, the liquid temperature exceeds the saturation temperature, and when a nucleation site or disturbance is introduced, rapid boiling can occur. This can happen, for example, when heating a liquid in a very clean container without any impurities or nucleation sites.
In both these cases, the temperature of the liquid exceeds the saturation temperature, thus leading to saturated boiling. Saturated boiling can have different effects and consequences depending on the system and conditions, such as heat transfer rates, pressure changes, and stability of the boiling process.
Conclusion:
In the given options, saturated boiling is the type of boiling where the temperature of the liquid exceeds the saturation temperature. Forced boiling, natural boiling, and pool boiling do not necessarily involve the liquid exceeding the saturation temperature.