Which change of phase represents sublimation?
It is an endothermic (absorbs heat) process. For example: Transformation of dry ice (solid carbon dioxide) to vapors to form clouds. Hence, phase change at standard temperature and pressure which represents sublimation is solid turns to a gas without going to liquid stage.
What is examples of freezing?
One example of freezing is when water turns into ice. Freezing is the opposite of melting, and two steps away from evaporation. Freezing occurs at below 0 degrees Celsius with water, while some other liquids become a solid at higher or lower temperatures. Most liquids can freeze.
Is freezing and solidification same?
Freezing, or solidification, is a phase transition in which a liquid turns into a solid when its temperature is lowered to or below its freezing point. For most substances, the melting and freezing points are the same temperature; however, certain substances possess different solid-liquid transition temperatures.
What is freezing point example?
The freezing point of seawater is below zero Celsius. Seawater remains liquid at temperatures lower than that of the freezing point of pure water….Freezing Point Examples.
| Solvent | Normal Freezing Point, degree Celsius | Freezing Point Depression, Kb, C m-1 |
|---|---|---|
| Water | 0.0 | 1.86 |
| Acetic Acid | 16.6 | 3.9 |
| Benzene | 5.5 | 5.12 |
What increases freezing point?
Freezing point, temperature at which a liquid becomes a solid. As with the melting point, increased pressure usually raises the freezing point. The freezing point is lower than the melting point in the case of mixtures and for certain organic compounds such as fats.
Which solution has lowest freezing point?
Hence the 0.2 M Na2SO4 has the lowest freezing point due to the highest moles of ions in solution.
Which of the following has maximum depression in freezing point?
Among given choices K2SO4 gives maximum number of ions, so it will have maximum depression in freezing point.
What causes depression in freezing point Class 12?
CBSE NCERT Notes Class 12 Chemistry Solutions. of the substance in its liquid phase is equal to the vapour pressure in the solid phase. If the vapour pressure of the solution is equal to the vapour pressure of the pure solid solvent then the solution freezes. This is known as depression in freezing point.