Answer:
The process in which a solid changes directly to a gas is called sublimation. It occurs when the particles of a solid absorb enough energy to completely overcome the force of attraction between them. Dry ice (solid carbon dioxide, CO2) is an example of a solid that undergoes sublimation.
I thinks it's true but I'm not sure
Inter-molecular forces. The greater the attraction between particles the more energy required to break the forces or "melt" them.
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