What is the change of a substance from a solid directly to a gas?

sublimation, in physics, conversion of a substance from the solid to the gaseous state without its becoming liquid. An example is the vaporization of frozen carbon dioxide (dry ice) at ordinary atmospheric pressure and temperature.

What forms a purple vapour when heated?

Iodine also sublimes – it turns directly from shiny purple-black crystals to a purple vapour when warmed up.

What happens to the molecules of a solid when it is heated?

When a solid is heated the particles gain energy and start to vibrate faster and faster. Further heating provides more energy until the particles start to break free of the structure. Although the particles are still loosely connected they are able to move around. At this point the solid is melting to form a liquid.

What phase changes a solid to a gas?

Sublimation is the phase transition from the solid to the gaseous phase, without passing through an intermediate liquid phase.

What happens during sublimation?

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.

What is solid to gas?

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. Sublimation has also been used as a generic term to describe a solid-to-gas transition (sublimation) followed by a gas-to-solid transition (deposition).

What element gives purple vapors?

As a pure element, iodine is a lustrous purple-black nonmetal that is solid under standard conditions. It sublimes (changes from a solid to a gaseous state while bypassing a liquid form) easily and gives off a purple vapor.

What happens to the particles of a gas when the gas changes into a liquid?

If a gas is cooled, its particles will eventually stop moving about so fast and form a liquid. This is called condensation and occurs at the same temperature as boiling. Hence, the boiling point and condensation point of a substance are the same temperature.

When a liquid changes to a gas it is called?

vaporization, conversion of a substance from the liquid or solid phase into the gaseous (vapour) phase. If conditions allow the formation of vapour bubbles within a liquid, the vaporization process is called boiling.

What happens to molecules in gas when heated?

Molecules within gases are further apart and weakly attracted to each other. Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.

What happens to the molecules of liquid changes to gas?

When a liquid changes to gas, the particles absorb heat energy and they start vibrating faster and distance between them increases. On constant vibration, intermolecular forces decrease and particles start moving away from each other and change to gas.

What change occurs when two clear liquids are mixed together?

physical change, dissolve is a size change A solid bright yellow substance forms when two clear liquids are mixed together. chemical change, precipitate forms and color change

What is the process of changing solid to gas called?

The process of changing a solid into a gas is called sublimation. This is the phase transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase.

What happens when grey metal dissolves in pinky orange solution?

DISPLACEMENT: Pinky orange solid forms; grey metal dissolves and blue colour of the solution fades & eventually becomes colourless Nice work! You just studied 16 terms!

What happens when grey metal is heated with sodium hydrogen carbonate?

COMBINATION: The grey metal burns with red orange sparks of light in the colourless gas, and a grey black solid is formed. Heat Sodium hydrogen carbonate strongly, pass the gas produced through limewater.