How much PSI is built up in a mento and coke explosion?

The pressure built up in a Mentos and Coke explosion can vary, but it typically reaches around 2 to 4 psi (pounds per square inch) during the initial reaction. This pressure results from the rapid release of carbon dioxide gas when Mentos candies are added to the soda. While this pressure is relatively low compared to other explosive reactions, it is sufficient to propel the soda several feet into the air due to the rapid gas expansion.