Question

What happens to dry ice when the pressure under which it is stored is decreased?

• A. Solid $C{O}_2$ converts into liquid $C{O}_2$
• B. Solid $C{O}_2$ gets directly converted into gaseous $C{O}_2$.
• C. Liquid $C{O}_2$ gets directly converted into gaseous $C{O}_2$.
• D. Gaseous $C{O}_2$ gets directly converted into solid$C{O}_2$.

Answer 1

The correct option is B Solid $C{O}_2$ gets directly converted into gaseous $C{O}_2$.

Solid carbon dioxide is also known as dry ice. Unlike the ice cubes in a cold drink , dry ice doesn't melt to become liquid at all. Instead, at room temperature, it changes directly from a solid to a gas a process called sublimation.
This happens because when pressure is decreased, intermolecular forces of attraction or distance between the particles increases.