🗑️ 🧵 Untitled Thread
Anonymous at Fri, 15 Nov 2024 19:33:44 UTC No. 16476652
What is the science of red hot embers, that no longer burn, not rekindling new wood put into the fireplace and instead just turning them into more black embers, until you throw a match onto the fire and the whole thing is ignited? As if it wants to burn but is unable to kindle itself without another fire from outside.
>Newton?
Anonymous at Fri, 15 Nov 2024 22:06:13 UTC No. 16476943
>>16476652
It burns as in running an exothermic redox reaction. There is just no flame, as the flammable gases have already been driven off, hopefully burned. A yellow flame is just glowing carbon that is not (yet) turned to CO2.
Depending on how you set up the firewood, you can get blue flickering (or "dancing") flames. This is from carbon monoxide that starts burning once it gets enough oxygen to complete the combustions.
Anonymous at Sat, 16 Nov 2024 17:35:41 UTC No. 16477978
Just solid carbon smoddering with little gas phase.
Anonymous at Sun, 17 Nov 2024 18:23:38 UTC No. 16479514
>>16477978
>>16476943
But why isn't the fresh wood burning until I introduce a flame?
Anonymous at Sun, 17 Nov 2024 21:15:12 UTC No. 16479739
>>16479514
You need to ignite the flammable gases emitted by the hot wood.
Anonymous at Mon, 18 Nov 2024 00:07:08 UTC No. 16479991
>>16479739
i.e blow air into them when you have new wood on top