Question

A chunk of dry ice, solid co2, disappears after sitting at room temperature for a while. There is no puddle of liquid. What happened?.

Answer 1

When dry ice (solid carbon dioxide) is exposed to room temperature, it sublimates, meaning it changes directly from a solid to a gas. This process is known as sublimation and is why dry ice "disappears" when left at room temperature. The gas produced is carbon dioxide, which is odorless and colorless.