Question

1. co₂(s)→co₂(g) type of change:

Explanation:

The process \( \text{CO}_2(\text{s})
ightarrow \text{CO}_2(\text{g}) \) involves a change in the physical state of carbon dioxide from solid (dry ice) to gas. A phase change where a solid directly converts to a gas without passing through the liquid state is called sublimation. Since the chemical identity of \( \text{CO}_2 \) remains the same (it's still \( \text{CO}_2 \), just changing state), this is a physical change, specifically sublimation.

Answer:

Sublimation (or Physical Change - Sublimation)