http://hypertextbook.com/facts/2000/SeemaMeraj.shtml"For example, the table shows a typical can of Coca-Cola classic with 3.7 volumes of carbon dioxide dissolved in the product at a temperature of 75F has an internal pressure of about 55 psi."
这个3.7体积应该是指一大气压的情况。即使可乐罐预留了20%的膨胀体积，那么CO2从冰中全部析出之后（水合物的相态不考虑），那么会是5大气压，73.5psi，当然要破。