When a solid changes instantly to a gas?

Answer 1

This process is called sublimation. The opposite (deposition) is where a gas turns directly into a solid. Sublimation occurs if the pressure and temperature are right for the specific substance, so that the solid phase in a phase diagram borders the gas phase.

Examples are: Carbon Dioxide cannot exist as a liquid state at 1 atmosphere pressure, so dry ice (frozen carbon dioxide) turns directly to a gas. In your freezer, ice cubes can sublime away directly into water vapor while in the freezer.

An example of deposition is: Formation of frost and snowflakes directly from water vapor occur at the proper temperature and air pressure.

Answer 2

When a compound changes from a solid to a gas without first going through the liquid phase, it is termed sublimation. Three examples are mothballs, solid air freshners (Air Wick) and dry ice (frozen CO2).

Cheers Malcolm

Answer 3

It depends of which kind of change of state you mean. If you mean from solid to liquid and finally to gas, then basically the atoms in the material begin to change from their more rigid state to a more "free" state. They can move about more easily. Also, when solid, a material has a defined shaped (since its atoms are almost immobile). On the other hand, when a material is liquid its shape becomes undefined and it only takes the shape of a container, and when it is a gas even more so. If you mean a change from solid directly to gas, then this is called sublimation. This occurs without an intermediate liquid state. It can happen because of extreme temperatures or special characteristics of an element or compound, for instance.

Answer 4

There are four States of Matter: Solid, Liquid, Gas and Plasma (super heated gas)

For a solid object to become a gas, it must first become a liquid. For example:

if you put an ice cube in a pan, it would melt, before it turned into a gas.

Answer 5

The process is called "Sublimation". Whether a solid changes directly to a gas, or first to a liquid, then to a gas, depends on the pressure. For example, carbon dioxide will sublimate at room temperature; but at pressures above 5.2 atmospheres, it will change from solid to liquid and then from liquid to gas insatead.

Answer 6

When a solid changes to a gas directly, it is known as sublimation. One example of this is dry ice becoming carbon dioxide.

Answer 7

The process from solid to gas is called sublimation. It skips the liquid stage. This occurs in elements like arsenic.

Answer 8

The process from solid to gas is sublimation. An example is dry ice.

Answer 9

The process in which a solid changes directly into a gas is called sublimation.

Answer 10

by boiling it