Why naphthale ne ball disappeares?

Naphthalene balls, commonly used as mothballs, gradually disappear due to sublimation, a process where solid naphthalene transitions directly into gas without becoming liquid. As the naphthalene evaporates, it disperses into the air, leading to a reduction in the size of the balls. This process can be accelerated by factors such as heat and airflow. Over time, this results in the complete disappearance of the naphthalene balls.