Decarboxylation of Sodium Pyruvate
As pointed out in the comments above, the expected product would be acetaldehyde, not acetic acid. 



If you stop and think about the mechanism of any thermal decarboxylation, you immediately stumble upon the issue. The decarboxylation would lead to a d1 type synthon, which from organic chemistry you should realise is the wrong polarity for a carbonyl group (the natural polarity of the C=O bond is to have a partial positive charge on carbon and partial negative charge on oxygen).