Please Sir I Don't Want Any More  - Page 1
Forum section: electronics / general

author: Sionyn
author_rank: Frequent Contributor
timestamp: December 24, 2012, 07:20:19 pm
content: forget the rubbish in can ever seen a self heating can before ?any clues what chemical reation is going on here ?CaO(s)+ H2O(l) ? Ca(OH)2(s)Copper sulfate and powdered zinc can also be used, but to lesser effect:CuSO4(s) + Zn(s) ? ZnSO4(s) + Cu(s)bonus trickshttp://www.guardian.co.uk/science/blog/2012/dec/21/christmas-dinner-chemistry-party-tricks

author: M0BSW
author_rank: Frequent Contributor
timestamp: December 24, 2012, 08:09:36 pm
content: I suppose if you lived on your own and felt sorry for yourself, it's hot and hmmmmmmmmmmmmmmmmmmmmmmmm

author: G7PSK
author_rank: Super Contributor
timestamp: December 24, 2012, 10:28:20 pm
content: That looks like someone has already eaten it already, then had a few too many.

author: grumpydoc
author_rank: Super Contributor
timestamp: December 24, 2012, 10:54:47 pm
content: Don't understand why anyone would bother unless they want to eat it in the middle of a field or other location away from any available heat source.I'd have thought that a ready meal from <insert name of your favourite supermarket chain> would be a) probably cheaper, b) less hassle and c) actually taste better (although I normally struggle to think of anything that would taste worse than a supermarket ready meal, I think this might be it).

author: free_electron
author_rank: Super Contributor
timestamp: December 25, 2012, 12:41:48 am
content: oh my... this classifies as one of these foods where there is no telling what it looked like when it was still alive... pig ? cow ? hore ? dog ? cat ? racoon ? skunk ? your guess is a s good as mine...

author: Hypernova
author_rank: Unknown
timestamp: December 25, 2012, 01:46:05 am
content: Quote from: free_electron on December 25, 2012, 12:41:48 am1 vote down for random hobo off the street who happened to walk by the factory gate.

author: ee851
author_rank: Regular Contributor
timestamp: December 25, 2012, 02:04:27 am
content: It's for homeless people.

author: ftransform
author_rank: Frequent Contributor
timestamp: December 25, 2012, 02:54:12 am
content: I think its pretty cool. Not as yummy as my chirstmas turkey but the reaction is cool.electronics and chem geeks don't get along do they?the reviewer sounds annoying.I always end up making a stew like that out of the leftover turkey bits. Usually its fairly tasty. That or I mix with salsa and make a mexican version of that.What does this man expect of canned food? The best "chirstmas" dinner I can come up with using canned food is a DAK canned ham with brown sugar and cloves on it.I gotta buy a few of those lol.

author: SeanB
author_rank: Super Contributor
timestamp: December 25, 2012, 04:54:53 am
content: MMMMMM, Rat packs..................

author: Simon
author_rank: Unknown
timestamp: December 26, 2012, 11:45:01 pm
content: Now I'm no cook but in 10 minutes can cook a steak in a pan and lightly boil some green beans.

author: nixxon
author_rank: Frequent Contributor
timestamp: December 27, 2012, 12:11:42 am
content: If we can forget about the food inside the can for a while: what chemistry made the increase in temperature? It looked like a pretty exothermic reaction going on...

author: westfw
author_rank: Super Contributor
timestamp: December 27, 2012, 01:42:21 am
content: Self-heating cans based on calcium silicide and iron oxide date back to WWII. Following wikipedia links, it looks like modern reactions are based on Magnesium/Water reactions with iron and salt as "helpers." Generates about 310 calories/g. (ah. That probably explains why CaSi2 is so hard to get these days...http://en.wikipedia.org/wiki/Self-heating_food_packaging