Final answer:
When a gas undergoes changes of state, various processes occur including evaporation, condensation, deposition, and sublimation.
Step-by-step explanation:
When the changes of state occur in a gas, different processes take place. The processes are:
- Evaporation: This occurs when a liquid turns into a gas. An example is when water boils and turns into steam.
- Condensation: This is the opposite of evaporation, where a gas turns into a liquid. An example is when water vapor cools down and forms droplets of liquid on a cold surface.
- Deposition: This is the process where a gas directly turns into a solid, without first becoming a liquid. An example of this is when frost forms on a cold window.
- Sublimation: This is the process where a solid directly turns into a gas, without first becoming a liquid. An example is when dry ice, which is solid carbon dioxide, turns into carbon dioxide gas.