What is the difference between the dissoolving of solids and gases in terms of molecular motion?
468561
In terms of molecular motion, molecules of a gas have higher kinetic energy (moving energy)than molecules of a solid do.\n\nBecause molecules of a gas have higher kinetic energy, they always move fast and they don't stay solid at any particular moment you observe (that's why you can walk through gaseous environment because molecules of a gas don't stay into a solid layer to stop you). Because they are freely moving like that, it will be energetically favorable to dissolve gas into other medium.\n\nIn contrast, molecules of a solid stay connected to each other (crystal lattice,...). When you want to dissolve a solid to other medium, you have to break up the bonds between molecules of the solid. Breaking up molecular bonds is energetically unfavorable; in other words, it takes up energy to break up chemical bonds and energy is not always available to do that. In the case of molecules of gas, they're already freely moving so at some moments, they just wander off and dissolve.
174818
Its all about shape and volume.  Solids have a set, defined shape, and a set volume.  Liquids have no defined shape, but a set volume, and gas has no set shape nor a set volume.  Those two things define whether or not something is solid, liquid, or gas.
930214
solid to gas is endothermic reaction as it absorbs energy\ngas to solid is exothermic as it give off energy
912739
Very simple. Its the transformation straight from solid to gas, skipping the liquid stage. Most common example it dry ice placed in water. The fog you see is mostly carbon dioxide gas.
555636
Vaporization = Liquid to gas\n\nEvaporization = Liquid to gas but occurs on the surface of the liquid.
128926
When a substance is in liquid state, the cohesion between its molecules is pretty much different from something in a solid state.  Let's say, there is a larger gap between molecules.  This gives the substance a more "flexible" condition.  This flexibility (if we so call it) give the substance the property to adquire the shape of its container and if this container has two ends and a slanted angle... there you go!  It flows!
38108
It's a colloid in the form of gas in a solid.
756709
movement of molecules is primarily the only similarity. With active transport molecules move from an area of lesser concentration to an area of greater concentration, this requires energy.  Diffusion is also the movement of molecules but they move from an area of grater concentration to an area of lesser concentration; occurs because molecules have free energy, like the diffusion of o2 &co2 in the lungs
97128
This is a classic result of intermolecular forces.  \nCO2 is a nonpolar molecule, meaning that molecules of CO2 have very little attraction between other molecules of CO2, so they like to be separate and just float around as gases.  (The only intermolecular force affecting CO2 is London dispersion, the weakest one.)  \nSiO2, on the other hand, is a network solid, which means that each unit of SiO2 is covalently bonded to another SiO2 unit, and covalent bonds are always stronger than any intermolecular force.  That's why it's a solid.
220544
molecules slowly dissipate into the air. Some molecules faster than others depending on how concentrated they are and if they are in a liquid state
362248
Listen to IBL.  Metaraison's first and last sentences were right, but the transition from gas to solid is called deposition, not freezing.\n\nNames for phase transisitions:\ngas to liquid: condensation\nliquid to gas: boiling\ngas to solid: deposition\nsolid to gas: sublimation\nliquid to solid: freezing\nsolid to liquid: melting
1055255
the diffusion of liquids and gasses are limited by the cohesive bonds between the composite molecules, and en masse by the forces of gravity in the y axis and friction and cohesion in the x-z plane.  In a gas, the inter-bonding is limited or nil, so each molecule has more degrees of freedom and hence more statistical probability of random scattering, or diffusion.
139401
diffusion is when one gas mixes with another gas. An example is when you open a bottle of perfume in a room. Eventually the odor will permeate the entire room. That's diffusion.\neffusion is when a gas penetrates through a barrier, either into a container or out of one.  An example is when oxygen gas effuses through the bread bag and the bread inside goes stale.
852036
It's called vapor deposition.  Sublimation is when a solid goes directly to gas.
184098
has to do with intermolecular bonds. The bonds that hold a solid together are more ridgid than that of a liquid.
771899
When a solid is heated, the molecules become active and the bonds between them come looser, this is how a solid becomes a liquid.\nThe warmer the liquid becomes, the molecular bonds become even less connected and the liquid becomes a gas. (evaporation)\n\nWhen a gas is cooled, the molecular bonds change and they become tighter. or closer together causing the gas to turn back into a liquid (condensation).  And as the molecules become tighter still, then the liquid turns back into a solid.\n\nFreezing and melting points change per molecule.
530314
Solids, liquids, and gases refer to the individual properties of matter.  Air pollution is a mix of liquids solids and gases depending on what the pollution is.  Smoke for instance is just micro-solid particles in the air.  Hydrogen sulfide for example would be a gas.