Sublimation is a process in which a solid turns directly into gas without passing into liquid state. It works on the principle that solids have a weak intermolecular force hence a higher vapour pressure which converts it into directly vapour state.

Answer. The process in which a solid substance directly changes into its gaseous state without coververting into liquid and vice versa is known as sublimation. Examples : Dry ice, camphor, naphthalene etc.

Sublimation is the process by which a substance changes from solid state directly to vapour state. Example : dry ice, naphthalene balls etc.

Practical Applications of Sublimation Sublimation of iodine may be used to reveal latent fingerprints on paper. Sublimation is used to purify compounds. It is especially useful for organic compounds. Because dry ice sublimates so readily, the compound is used to produce fog effects.

This technique offers many ADVANTAGES: This is one of the few methods that will allow printing on rigid surfaces (mugs, photo slates, plates, clocks, etc.) It’s relatively simple and has a very short learning curve (fast learning process). It offers an unlimited range of colours.

Sublimation is the direct transition from the solid state to vapor, and the heat absorbed by it is equal to the sum of the latent heats of fusion and of vaporization.

When dry ice heats up, the solid becomes a gas directly (any liquid is from water condensing on the dry ice). This process is called sublimation. Because of the dry air in the freezer, ice cubes will sublimate and will disappear. Also, any water vapor in the air can freeze out on cold surfaces.

Calculate the heat of sublimation of the substance by dividing the heat absorbed by the substance, as calculated in step 2, by the mass of substance in grams. For example, if 47.5 g of substance was placed in the calorimeter, then the heat of sublimation would be 27,100 / 47.5 = 571 J/g.

Is it a heating or cooling process? Sublimation is when the fastest molecules at the surface of a solid have escape velocity and leave to become a gas. Condensation is when a gas becomes a liquid. It is a warming process.

Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase. Also, at pressures below the triple point pressure, an increase in temperature will result in a solid being converted to gas without passing through the liquid region.

The sublimation of solid carbon dioxide is a spontaneous process.

Both the processes of ice melting at 10oC and water freezing at -10oC are spontaneous reactions; they can occur. Both these reactions occur as they result in an increase in the total entropy.

Explanation: Entropy decreases when the number of moles of gas decreases during a reaction. When a substance goes from a solid to a gas (sublimation) or from a liquid to a gas (evaporation), entropy increases. Likewise, when a solid dissolves in water, entropy increases.