That's not quite right! Carbon dioxide does exist in a liquid state. It's just that the conditions needed to make it liquid are a bit different from what we typically experience.

Here's why:

* Pressure is Key: Carbon dioxide doesn't exist as a liquid at standard atmospheric pressure (the pressure we experience at sea level). Instead, it transitions directly from solid (dry ice) to gas (CO2). This is called sublimation.

* Critical Point: To get liquid CO2, you need to increase the pressure. Every substance has a critical point, a temperature and pressure above which it cannot exist as a liquid. For CO2, the critical point is 31°C (88°F) and 73.8 bar (1,071 psi).

* Liquid CO2 Applications: Liquid CO2 is actually quite useful! It's used in:

* Carbonated drinks: The fizz in soda comes from dissolved CO2 under pressure.

* Fire extinguishers: CO2 is a non-flammable gas that displaces oxygen, helping to put out fires.

* Industrial processes: CO2 is used as a solvent, refrigerant, and in various chemical reactions.

So, while we don't see liquid CO2 under normal conditions, it's a very real and useful form of the compound!