What be involved in the process that is opposite to sublimation? Do you think such a process exists? would Why why not?
Answers
the phase change that occurs when a substance goes directly from a solid to a gas. When sublimation occurs, the substance does not go through the liquid phase. Energy is required for a solid to sublime into a gas. In nature, the heat produced by sunlight is usually the energy source. An example of sublimation is how dry ice reacts when exposed to an average room temperature and pressure. Dry ice is carbon dioxide that was solidified through a complex process involving condensation into a liquid at very low temperature and high pressure and subsequent release of the pressure, which causes rapid evaporation of about half of the liquid CO2, providing enough energy to freeze the remaining liquid into solid CO2, or dry ice. When exposed to normal atmospheric pressure and temperature, dry ice sublimes into vapor.
Sublimation is the transition from the solid to the gas state. A good example is carbon dioxide ice. The opposite of this process is called deposition : the transition from the gas to the solid.
The reverse of deposition is sublimation and hence sometimes deposition is called desublimation. One example of deposition is the process by which, in sub-freezing air, water vapor changes directly to ice without first becoming a liquid.