Anyone know where I can get some dry ice in La Paz? My son and I are going fishing for four days in La Paz this week and I don't have a freezer
chest. Need some dry ice to store all the fish filets we get so we can bring them back to the states frozen.comitan - 8-3-2009 at 06:19 AM
There is no dry ice in La Paz.David K - 8-3-2009 at 07:43 AM
Are there no ice cream vendors pushing carts on the streets of La Paz?comitan - 8-3-2009 at 07:45 AM
DK There is NO dry ice in La Paz, The ice cream carts do not use dry ice...........................................................David K - 8-3-2009 at 07:59 AM
Oh, I understand that there is no dry ice down there... I was wondering IF there were carts... if so, what they use instead of dry ice?comitan - 8-3-2009 at 08:10 AM
Just the frozen stuff thats in them, they are so well insulated they stay frozen for the whole day.
[Edited on 8-3-2009 by comitan]LOSARIPES - 8-4-2009 at 07:41 AM
The ice cream vendor carts have a layer of ice and salt around the inside box. Salt helps the ice last longer... coarse saltvandenberg - 8-4-2009 at 07:45 AM
Quote:
Originally posted by LOSARIPES
The ice cream vendor carts have a layer of ice and salt around the inside box. Salt helps the ice last longer... coarse salt
Now I finally understand why they salt the roads in the "cold country". To preserve the ice.
Makes sense.oldlady - 8-4-2009 at 07:51 AM
Yep, had a long steep driveway in Connecticut and would salt it at the first freezing rain! Dumb.
Making DRY Ice
MrBillM - 8-4-2009 at 10:07 AM
Many years ago, when our refrigerators in Baja were all Old Servels that took hours to come down to a useable temperature, I wondered about
transporting CO2 and making my own. I knew from a friend that it was common for him to use a fire extinguisher to ice down beer at a picnic.
Additionally, during that time Northern Hydraulics (now Northern Tools) was marketing a Dry Ice maker for around $120. It was essentially a Hardwood
cube with hinges that could be broken open and a valve-adapter assembly that went into one side of the cube. Fairly simple. I considered making my
own. Tank wasn't included.
However, when I went down to the Welding shop so inquire into buying/exhanging tanks for that purpose, I found that he had a customer who came in
periodically to do exactly what I was thinking of, but he did it on the spot because the volume of CO2 required was substantial for the product
produced. My idea of transporting small tanks wasn't practical.vandenberg - 8-4-2009 at 01:35 PM
Science 101 ??BajaBruno - 8-4-2009 at 01:57 PM
Someone correct me if I get the details wrong, but from my fuzzy recollection of thermodynamics, the salt causes a chemical reaction that forces the
ice to melt. The process of melting requires heat (or, heat differential), so the melting ice grabs heat from the nearest surface, that being the ice
cream, in this case.
The ice cream is cooled because it has lost heat to the melting process. This is the same reason that acetone feels cold if you splash a little on
your hand (wear gloves for this experiment)--as it evaporates, it pulls heat from your skin, making it cooler. See Lencho for further details. Bajahowodd - 8-4-2009 at 03:20 PM
Business opportunity. Open the first dry ice plant in La Paz!comitan - 8-4-2009 at 04:17 PM
Bajahowodd Researched and thought about it but I believe a 30# cyl. Makes 10lbs dry ice just not a worthwhile business for me.flyfishinPam - 8-4-2009 at 06:24 PM
Quote:
Originally posted by vandenberg
Quote:
Originally posted by LOSARIPES
The ice cream vendor carts have a layer of ice and salt around the inside box. Salt helps the ice last longer... coarse salt
Now I finally understand why they salt the roads in the "cold country". To preserve the ice.
Makes sense.
a mixture will have a lower freezing point than the pure compound. water freezes at 0C so add salt and its freezing point will lower.
has the opposite effect too adding salt to boiling water will cause that solution to boil at a higher temp (above 100C)
the metric system rules
[Edited on 8-5-2009 by flyfishinPam]bajalou - 8-4-2009 at 07:17 PM
In another age, frozen meat was transported from packing house to distribution point clear across the US in railroad refer cars using ice and salt to
keep it cold. It was reiced every few hundred miles with ice and 30% salt. 300 lbs ice - 100 lbs salt. This method was used until the mechanical
refers became popular. Now of course, it's refrigerated trailers.monoloco - 8-5-2009 at 10:00 PM
Fertilizer also has a chilling effect when mixed with water. I have seen guys cool down their ballenas in the fertilizer tambo.Heather - 8-6-2009 at 11:00 AM
Looks like Pam has the science down. Adding salt to your boiling water makes it increase in temperature, thus cooks the food faster, too.
Ammonium nitrate in the fertilizer reacts with water in an endothermic reaction, meaning it absorbs heat and thus feels cool.BMG - 8-6-2009 at 11:20 AM
Quote:
Originally posted by monoloco
I have seen guys cool down their ballenas in the fertilizer tambo.
Thanks, but I'll stick with lime.comitan - 8-6-2009 at 12:24 PM
I wonder if its the salt that makes it cold enough, so you can make your own Ice Cream.
