What are the characteristics of substances that can undergo sublimation?
Any solid may be sublimed if its temperature and pressure are below its triple point. For example, if you were to freeze water into ice and cool it further and then reduce the pressure, you could get ice to sublime.
What is a substance that undergoes sublimation?
Camphor, maphthalene, ammonium chloride, iodine, and dry ice are some substances which undergo sublimation.
What properties of compounds are important for sublimation to occur?
For sublimation to occur, a solid must exhibit a higher than usual vapor pressure, i.e. it must have weak intermolecular attractions. This is normally true for solids with molecules in the shape of a sphere or a cylinder.
What are the properties of organic compounds which can undergo sublimation?
Compounds that are capable of sublimation tend to be those with weak intermolecular forces in the solid state. These include compounds with symmetrical or spherical structures. Examples of compounds that can be sublimed are in Figure 6.28.
What are the two substances that undergo sublimation?
(a) Sublimation is the change of a solid directly into vapour on heating and of vapour into solid on cooling. Iodine and camphor are two substances that undergo sublimation.
Why do substances undergo sublimation?
Sublimation is caused by the absorption of heat which provides enough energy for some molecules to overcome the attractive forces of their neighbors and escape into the vapor phase. Since the process requires additional energy, it is an endothermic change.
What are the three substances that can undergo sublimation?
Some substances that undergo sublimation are:
- Carbon -dioxide ( dry ice)
- water ( snow and ice sublime)
- Naphthalene.
- Iodine.
- Arsenic.
- Camphor.
- Caffeine.
Which compound will undergo sublimation?
Answer: Camphor will undergo sublimation.
What is sublimation give two examples of substances which undergo sublimation?
The changing of vapor (or gas) directly into solid is called sublimation. The common substances which undergo sublimation are Iodine, Camphor, Naphthalene and Anthracene.
What is sublimation write two examples of substances which undergo sublimation?
Sublimates are chemicals that are undergoing sublimation. Ammonium Chloride is white solid on heating it sublimes and Naphthalene balls are the two examples of substance that sublimes.
What is sublimation give an example of a substance that undergoes sublimation?
Sublimation is the process in which a solid changes directly to a gas without going through the liquid state. Solid carbon dioxide is an example of a substance that undergoes sublimation. Snow and ice undergo sublimation under certain conditions.
Which is the best definition of sublimation in chemistry?
What is Sublimation? The term sublimation is the passage or the transformation or conversion that substances undergo when passing from one state to another, for example from a solid substance to gas. We can define sublimation as the transition of a substance from the solid phase to the gaseous phase without changing into the liquid phase.
When does sublimation occur in an endothermic phase?
Sublimation is an endothermic phase transition that occurs at temperatures and pressures below a substance’s triple point in its phase diagram. In thermodynamics, the triple point of a substance is the temperature and pressure at which the three phases (gas, liquid, and solid) coexist in thermodynamic equilibrium.
When does water sublimate from a solid to a gas?
Below the triple point, solid water sublimates, changing directly into a gas with a temperature increase, and never passing through the liquid phase. CO2 has a triple point at a pressure higher than 1 atmospheric pressure, meaning that at Earth’s standard atmospheric pressure, CO2 will sublimate as it heats from a solid to a gas.
Which is an example of a sublime substance?
Camphor, a substance used in Indian household. It sublimes to give a pleasant smell and is sometimes used as a freshener. Dry ice, or solid carbon dioxide is used for cooling items, store special adhesives and also used for neutralizing alkalis. I will add when I find some more examples. The air fresheners used in toilets.