Frozen Acetic Acid glacial mixed with bicarbonate

Glacial acetic acid (99.7% pure) freezes at 16.6 degrees Celsius. I put some acetic acid in the fridge and freezer. The fridge did not freeze the acid (within an hour) so I moved it to the freezer. The frozen acid included some vapors that had frozen in the top air space in the beaker, but these quickly melted back in the classroom.
Adding sodium carbonate (solid) or sodium bicarbonate (aqueous) caused very little reaction. Even as the mixture warmed little bubbling happened. This is surprising because as water is produced or added, the acetic acid should melt. The melting point of vinegar is much lower than pure glacial acetic acid.
Potentially the low temperature plays a role in the thermodynamics where the low temperature minimizes the increase in entropy of the system during the reaction preventing the reaction from being spontaneous at the low temperature.

[@user-a6k9i6n9o6M]

WoW Now I'm Happy I See a Frozen Acid XD

[@James-wd9ib]

I always wondered about glacial acetic and baking soda. Surprised that there's so little activity in terms of fizzing. There are self-inflating devices that operate on the mixing of acetic acid and sodium bicarbonate, which got me started wondering about this.

[@nathankwan3108]

I was testing some things with glacial acetic acid and baking soda, and I think both (or one) needs to be aqueous because the "real" reaction happens between the ions of the reaction and not the "whole" molecules. I came upon this when trying to set up a lab for reaction rate and concentration, and I kept wondering why 100% (glacial) acetic acid didn't show much of a reaction vs lower concentrations diluted with water. I would categorize this rate phenomena under "nature of reactants".

[@jamisonmeadows4655]

I know it's an old video but I thought glacial acetic acid froze at like 16°c?

[@runcycleskixc]

Would it be slippery if one made a skating rink of acetic acid?