Can solids evaporate? How can a solid have vapor pressure. How does it work?

The definition of evaporation is the process by which a liquid slowly turns into a gas, so solids cannot evaporate, but solids can be sublimated, such as winter clothes will dry when left outside, and sanitary balls will gradually become smaller.

Stools, tables, copper blocks, of course, can't, but some can't. For example, dry ice, etc. Stools, tables, copper blocks must first melt before evaporation.

Solids can achieve the effect of evaporation --- sublimation! The direct transformation of a solid into a gaseous state is sublimation.

That's called sublimation, such as iodine, and of course many solids can't be sublimated, they can only be melted and evaporated, such as stools, tables, copper blocks.

Evaporation refers to the process by which a liquid directly turns into a gas.

Ice can be sublimated from a solid to a gas directly, or it can be melted into a liquid and then into a gas.

In a physical sense, solids do not talk about evaporation.

The direct change of the solid state to the gaseous state is not called evaporation, it is called sublimation, and the direct change of the gaseous state to the solid state is called condensation.

Referring to the p-v-t phase diagrams of different substances, the coexistence regions of solid and gaseous states and the corresponding p-v-t requirements can be found.

Solids are also availableVapor pressure, but when it is balanced between sublimation and condensation, the ambient temperature is usually very demanding. The vapor pressure we talk about on weekdays refers to the vapor pressure of the gas phase or the liquid phase, and the solid will not sublimate at room temperature, so the vapor pressure of the solid is not talked about at room temperature.

In the large diagram of the three-phase shirt, the gas-solid equilibrium curve is the solid vapor pressure curve of the solid. When the pressure drops below the vapor pressure of the solid, the solid sublimates.

The three-phase diagram refers to the state curve of a substance with steam, liquid, and solid states drawn in a coordinate diagram with pressure p as the ordinate and temperature t as the abscissa.

Concepts related to phase law.

Phase: Physical and chemical properties within the system.

The part that is completely homogeneous is called the phase. There is an obvious interface between phases under specified conditions, and the change of macroscopic properties at the interface is leapfrogging.

Number of phases: The number of phases in the system is called the number of phases.

It is vapor pressure, any substance is strong in different pressures, and it will show different states at the temperature, so there will be Sochang vapor pressure Just like ice, dry ice.

Solids also have vapor pressure, but when it is in balance between sublimation and condensation, the ambient temperature is usually very demanding. The vapor pressure we talk about in daily life refers to the vapor pressure of the gas phase or the liquid phase, and the solid generally does not sublimate at room temperature, so we do not talk about the vapor pressure of the solid at room temperature. Solids are also returned by vapour pressure.

The liquid is able to evaporate on its own. It's like dew dries out.

Not evaporation but volatilization.

All liquids are volatile, non-volatile means that it is very difficult to volatilize Volatility refers to the process by which a substance changes from a solid or liquid to a gas or vapor.

For example, mercury (mercury) volatile gas can cause poisoning when inhaled.

The evaporation of a liquid is related to factors such as temperature, surface area, external gas fluidity and pressure, and if it is in a closed container, the evaporation of the liquid stops, that is, the number of molecules that leave the liquid and return to the liquid is balanced.

It depends on what kind of liquid it is. For example, water will evaporate, alcohol will evaporate, and nothing else will be necessarily.

Molecules in solid, liquid or gaseous states are constantly moving irregularly, and evaporation is the diffusion of liquid molecules into a gaseous or vacuum environment, no matter what particles will diffuse. Regardless of the temperature, the liquid has the phenomenon of evaporation, the temperature reflects the intensity of the molecular movement, the higher the temperature, the more molecules escape from the surface of the liquid due to the movement, the greater the degree of evaporation. There is no liquid that does not evaporate.

Evaporation: When the temperature of the liquid is below the boiling point, the vaporization process on the surface of the liquid occurs, which can occur at any temperature.

Factors that affect the speed of evaporation: temperature, humidity, surface area of liquidity, air flow on the surface of the liquid, etc.

Since the molecules in the liquid are constantly moving irregularly, the magnitude of their average kinetic energy is adapted to the temperature of the liquid itself. Due to the irregular motion of molecules and their collisions with each other, there are always some molecules at any moment that have a kinetic energy greater than the average kinetic energy of the flat path. If these molecules with sufficient kinetic energy are near the liquid surface, and their kinetic energy is greater than the work required to overcome the gravitational pull between the inner molecules of the liquid when they fly out, these molecules can fly out of the liquid surface and become the vapor of the liquid, which is the phenomenon of evaporation.