To change from a solid to a gas needs what to happen?

Answer 1

you need to heat the material to its melting point and then to its boiling point eg water's freezing point and melting points are respectively at zero. To melt water ypu would have to heat it up to at least 0 deg C, to change the liguid into its gaseous state you would have to heat it up to waters boiling point which is 100 deg C etc

Answer 2

Heat energy is generally necessary to get a phase transition. In some materials, with temperatures slightly above the "triple point", simply decreasing pressure will allow a solid to become liquid (as it draws heat energy from the environment), then go to a gas (again drawing heat energy from the environment).

Answer 3

This process is called "sublimation", and it happens when the pressure is sufficiently low. The pressure depends on the substance. As an example, carbon dioxide will sublimate at a pressure of less than 5.2 atmospheres; at pressures above that, it will do the more familiar change from solid to liquid, and from liquid to gas. The required pressure refers to the substance's partial pressure, so basically lots of substances can sublimate to a certain degree.

Answer 4

the molecules or atoms of a gas must come very close to each other in case if the want to become solid or liquid

in order to achieve this we have to lower the temperature so that the gas particles don't zoom from here to there instead they should move with very slow speed but this is not enough we have to increase pressure also and reduce the volume in order to make the solid or in liquid state

Answer 5

An energy influx equivalent to the heat of evaporation per unit mass must occur. This can be done either as a heat influx or pressure change.

Answer 6

In order for a liquid to become a gas, it has to undergo evaporation.

Evaporation happens when a liquid is heated up enough and turns into steam or some kind of gas.

Answer 7

The process by which a Liquid changes into a Gas is called Evaporation. To go from a Solid DIRECTLY to the Gas Phase is known as Sublimation. =]

Answer 8

Energy must be removed from matter for it to change from liquid to a solid. That is, for it to freeze.

Answer 9

Heat.