A. 260°C
B. 360°C
C. 630°C
D. 620°C
¨ P2O5 is a hygroscopic powder which sublimes at a temperature of about 360°C.
¨ Hygroscopic materials have a strong affinity for water and readily absorb moisture from the surrounding environment. P2O5 is a commonly used desiccant due to its ability to remove moisture from the air. When exposed to moisture, P2O5 reacts with water to form phosphoric acid (H3PO4).
¨ Although P2O5 does not melt at a specific temperature, it can sublime (i.e., transition from a solid to a gas phase) when heated above its sublimation temperature of around 360°C. During sublimation, the solid P2O5 directly transitions into a gas without passing through a liquid phase.
Submitted by :- Jamil Ahmed