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Carbon dioxide is a chemical compound that is usually in the form of a gas. It is made up of one atom of carbon and two atoms of oxygen. Its chemical formula is CO 2. Carbon dioxide was discovered in the 1600s by a Belgian chemist named Jan Baptist van Helmont.
Find out more about carbon dioxide and test your knowledge in this guide for KS3 chemistry students aged 11-14 from BBC Bitesize.
Liquid carbon dioxide is the liquid state of carbon dioxide (CO 2 ), which cannot occur under atmospheric pressure. It can only exist at a pressure above 5.1 atm (5.2 bar; 75 psi), under 31.1 °C (88.0 °F) (temperature of critical point ) and above −56.6 °C (−69.9 °F) (temperature of triple point ). [ 1 ]
8 wrz 2024 · Carbon dioxide is made in the reactions between most acids and most metal carbonates. For example, the reaction between hydrochloric acid and calcium carbonate (limestone or chalk) makes carbon dioxide: The carbonic acid (H 2 CO 3) then decomposes to water and CO 2. Such reactions cause foaming or bubbling, or both.
Properties of saturated liquid Carbon Dioxide - CO2 - density, specific heat, kinematic viscosity, thermal conductivity and Prandtl number.
Carbon dioxide (CO 2) is a chemical compound and is acidic. It is a gas at room temperature. It is made of one carbon and two oxygen atoms. People and animals release carbon dioxide when they breathe out. Also, every time something organic is burnt (or a fire is made), it makes carbon dioxide. Plants use carbon dioxide to make food.
Carbon dioxide can be reduced to a liquid and solid form by intense pressure. At standard pressure , it is never liquid: it directly passes between the gaseous and solid phase at -78°C in a process called sublimation .
