You shake a can of soda and open it, which cause the pressure to decrease. what happens to the volume of the CO2. the soda

Answer: When you take the top off of a bottle of soda, the pressure inside the bottle decreases and goes to the same pressure as the atmosphere. When that happens the carbon dioxide inside is no longer forced to be a liquid and turns back into a gas, causing the bubbles that we're so familiar with.

Explanation:

However, producing foaming carbon dioxide gas by shaking a bottle of soda water is a physical change, while producing foaming carbon dioxide gas by combining baking soda and vinegar is a chemical change ... Because no chemical bonds are broken and no new molecules are formed, this is a physical change in the system.