You're right to be confused! Naphthalene doesn't actually sublime at room temperature. It has a sublimation point of around 80°C, which is the same as its melting point.

Here's why this seemingly contradictory behavior happens:

* Sublimation is the process of a solid directly changing into a gas, skipping the liquid phase.

* Melting is the process of a solid changing into a liquid.

While naphthalene has a relatively low melting point, it also has a high vapor pressure at room temperature. This means that even though it's not melting, a significant amount of naphthalene molecules are constantly escaping from the solid into the air.

This process of molecules escaping from the solid is often mistaken for sublimation, but it's technically called vaporization or evaporation.

In summary:

* Naphthalene doesn't truly sublime at room temperature.

* It has a high vapor pressure at room temperature, which leads to a noticeable amount of vaporization.

* This vaporization can give the impression of sublimation, but it's a separate process.

Let me know if you have any other questions!