Compare sublimation (solid→gas) and deposition (gas→solid) — two opposite phase transitions. See energy differences, examples, and calculate both simultaneously.
Toggle between the two opposite phase transitions
Understanding how sublimation and deposition are related yet opposite
| Property | Sublimation | Deposition |
|---|---|---|
| Direction | Solid → Gas | Gas → Solid |
| Energy | Absorbs (Endothermic) | Releases (Exothermic) |
| Temperature Effect | Cools surroundings | Warms surroundings |
| Molecular Motion | Increases dramatically | Decreases dramatically |
| Bond Changes | Bonds broken | Bonds formed |
| Volume Change | Expands greatly | Contracts greatly |
| Common Example | Dry ice fog | Frost on windows |
| Entropy | Increases (ΔS > 0) | Decreases (ΔS < 0) |
Calculate both sublimation energy and deposition energy for the same substance side by side
Enter parameters to see sublimation and deposition calculations side by side.
Sublimation converts solid directly to gas (endothermic — absorbs energy), while deposition converts gas directly to solid (exothermic — releases energy). They are exact reverse processes with equal but opposite energy requirements.
Yes, the magnitude of energy is identical. Sublimation absorbs exactly the same amount of energy that deposition releases for the same mass and substance. The latent heat value (L) is the same — only the direction differs.
Yes! At equilibrium, molecules sublimate from the solid surface while gas molecules simultaneously deposit back. The net direction depends on conditions — if temperature favors sublimation, more molecules leave than return, and vice versa.
Sublimation requires energy to break intermolecular bonds (endothermic). Deposition releases energy when new bonds form between gas molecules crystallizing into a solid lattice (exothermic). Bond breaking always requires energy; bond forming always releases it.
Sublimation: dry ice fog, freeze-drying food, snow disappearing in cold weather. Deposition: frost on car windshields, snowflake formation in clouds, CVD semiconductor coating, ice crystals forming inside freezers.
Both are extremely common. Sublimation occurs whenever snow/ice disappears without melting. Deposition occurs every time frost forms, snowflakes grow, or ice crystals appear in the atmosphere. The water cycle involves both processes continuously at global scale.