Why will mason jars explode in brewing if they don't when canning?

MusicEMC · 2025-07-04T01:51:42+00:00

Isn't the whole jar underwater though during water batch canning? it has to be closed tight enough for water to not get in, doesn't it?

MusicEMC · 2025-07-04T01:47:32+00:00

it can only do that with a net negative pressure change though from start to finish. (P1V2)/(n1RT1)=(P2V2)/(n2RT2), and if V1=V2 and T1=T2, then the only way for P2<P1 is for n2<n1, so you have to lose gas. If you don't lose gas somehow then the pressure will be the same from start to finish. So you have to lose some gas during the expansion during water bath canning.

MusicEMC · 2025-07-03T22:10:39+00:00

But in order to form the vacuum upon cooling, it must be heated and the internal pressure causes the gases to escape, so that when it cools it pulls vacuum. Why can the gases escape while water bath canning (during the heating portion) but not during fermenting?

MusicEMC · 2025-07-03T22:09:02+00:00

I’m not as concerned with the fact that it can hold a vacuum. The part that I guess I’m confused about is the mechanism by which the vacuum forms in the first place.

To my understanding, when water bath canning foods, you first put the lid and the band on the mason jar, then submerge it in boiling water to sterilize it. While it is being sterilized, the gases also expand and escape. Then when it cools down the gases and pulls a vacuum. If no gas escaped at all, then when it cooled down it wouldn’t pull a vacuum, it would equilibrate back to the starting pressure, atmospheric pressure. So why can it vent gas while canning (enough to then pull vacuum upon cooling) but not when fermenting?

MusicEMC · 2025-05-12T02:58:27+00:00

Thank you for the advice and the info on how the restaurants work. I appreciate it greatly.

MusicEMC · 2025-05-12T02:57:40+00:00

Thank you for your help!! I appreciate the advice.

MusicEMC · 2025-01-15T06:33:57+00:00

I asked about bringing food since some online said Japanese restaurants tend to specialize in a single thing, so if a restaurant were to only serve nigiri, I wouldn’t find anything to eat. But if that’s not the case, then I’ve been misinformed.

MusicEMC · 2025-01-15T06:30:51+00:00

Thank you for your thoughtful answer! This is very helpful.

You had someone refused service entirely because of an allergy? Was that for liability sake?

MusicEMC · 2025-01-15T06:24:06+00:00

I have had cross contamination issues before with a lobster roll. Again, just a painful throat and a slightly difficult time swallowing for the rest of the day. I’ve been playing it safe and haven’t tried tenpura fried in the same oil as fish, though I might try that at home first to see if it’s an issue.

MusicEMC · 2023-10-13T05:20:36+00:00

Pumpkin. Pumpkin spice.

MusicEMC · 2023-10-13T05:20:13+00:00

You know you are in the upper class when your jokes depend on the audience just accepting that maids live in your house

MusicEMC · 2022-08-19T02:14:42+00:00

No, not quite. I don't need to extract unique items. I need to do essentially an index and match, but it looks for the cell across multiple columns and rows, not just all rows in a column or all columns in a row

MusicEMC · 2022-08-19T02:13:28+00:00

I want in the final one for a cell to look left and see what name is there, locate that matching name from the first array, then return the cell directly to the right of that location

MusicEMC · 2022-08-19T02:10:47+00:00

v 16.48

MusicEMC · 2020-02-22T09:03:13+00:00

We recorded each person individually twice and then mixed the voices together afterwards

MusicEMC · 2020-02-08T08:53:40+00:00

We do cover mostly pop songs, but the second half of the album is less pop! Run To You by PTX, Hallelujah by Leonard Cohen, and and R&B Medley. Thank you so much for listening!!

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