Here's why:
* Sublimation is the process where a solid directly changes into a gas without passing through the liquid phase. This occurs when the vapor pressure of the solid exceeds atmospheric pressure.
* Sodium chloride has a very high melting point (801°C) and boiling point (1413°C). This means it requires a significant amount of energy to break the strong ionic bonds holding the sodium and chloride ions together.
* At temperatures below its boiling point, sodium chloride will melt into a liquid rather than directly vaporize.
Therefore, while sodium chloride can vaporize at high temperatures, it will first melt into a liquid before transitioning into a gaseous state.
