Supercritical CO2 Fluid Glass-sealed Carbon Dioxide CO₂ is in a liquid

CO₂ is in a liquid state under high pressure

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Supercritical CO2 Fluid Glass-sealed Carbon Dioxide CO₂ is in a liquidCarbon dioxide is sealed inside a glass tube. Below 31C, CO is in a liquid state under high pressure. When the temperature rises above 31C, CO can no longer be liquefied even at very high pressure and instead enters the supercritical state. Therefore, above 31C you can observe the fourth state of matter: the supercritical state (https: en. wikipedia. org wiki Supercritical_fluid). How to use Below 31C, you can see liquid CO inside the tube. Gently