Neither.
Tepid or room temperature water is generally considered the best for house plants.
The following URL will take you to an article from The New York Times published in 1878 where the author uses very hot water as an unusual plant remedy.
http://query.nytimes.com/gst/abstract.HTML?res=9D03E7D9113FE63BBC4F52DFB4668383669FDE
I'm not sure I'd try it on an expensive or much loved plant until I'd experimented a bit.
yes
it will get wet...
it will get hot
Most waxes will soften if you put it into a bowl of hot water. If you put butter into the same bowl, it will also soften.
it will melt
The air in water bottle expands
it will swell, but won't lyse.
It would actually melt since the water is hot.
It will pop just like water just not a bad
oxidation occurs and rust forms on the piece of iron from the oxygen in the water
it depends on the plant. some plants cant take a lot of water and other plants can absord a lot of water without it killing them
Alcohol is a cellular poison. Don't put it on plants.