chornedsnorkack
National Hazard
Posts: 539
Registered: 16-2-2012
Member Is Offline
Mood: No Mood
|
|
Exothermic reactions of ice
A lot of substances react with water exothermically.
But ice has a substantial latent heat of melting.
Can you list reagents which react with water exothermically enough to melt ice and have heat left over?
|
|
|
deltaH
Dangerous source of unreferenced speculation
Posts: 1663
Registered: 30-9-2013
Location: South Africa
Member Is Offline
Mood: Heavily protonated
|
|
There is probably a very large number of substances that will react with ice exothermically.
Aluminium-ice sticks out as it's the basis of the ALICE propellant from which you can even build a rocket 
See https://www.youtube.com/watch?v=VVP4VX2w4VA
|
|
|
szuko03
Hazard to Others
Posts: 188
Registered: 3-4-2015
Location: USA
Member Is Offline
Mood: No Mood
|
|
That ALICE propellant seems very interesting. They need to make the Al even finer! I know how ridiculously small that is, actually its to small for me
to picture however I think if they made it even smaller it would probably burn even better. How do you even get things that fine anyway?
Chemistry is a natural drive, not an interest.
|
|
|
TheAlchemistPirate
Hazard to Others
Posts: 151
Registered: 25-3-2014
Location: The point of no return
Member Is Offline
Mood: Enigmatic
|
|
I wonder what the ratio of Al to Ice is. It would be interesting to test it this winter with snow and pyro aluminum...
"Is this even science anymore?!"
|
|
|
careysub
International Hazard
Posts: 1339
Registered: 4-8-2014
Location: Coastal Sage Scrub Biome
Member Is Offline
Mood: Lowest quantum state
|
|
An interesting side note: did you know that it is theoretically possible to have a super-cooled water detonation?
The reaction product driving the detonation shock is ice and it exactly fits the technical criteria of detonations.
I don't know if this has ever been observed, all detonations require a certain scale ("minimum diameter") and for an supercooled water detonation it
would be tens of meters, at least.
Perhaps on one of the "water worlds" they have been detecting recently, you might have freezing/thaw cycles with the formation of lakes or seas of
super-cooled water (since there is no land on the planet, there is no dust to act as nucleating agents) that freeze suddenly with a "bang".
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
