| LemonSlice said: I can't believe I got the chemical reaction one wrong. Is the breaking of hydrogen bonds not a chemical reaction? I'm confused. |
I wasn't sure what defined a "chemical reaction" either.
| LemonSlice said: I can't believe I got the chemical reaction one wrong. Is the breaking of hydrogen bonds not a chemical reaction? I'm confused. |
Boiling water doesn't break haydrogen bonds. Boiling water is a physical reaction, not a chemical one. You simply add thermal energy to the mass of water.
Boiling the water does not change the water molecules themselves in any way, thus it does not qualify as a chemical reaction.
Sorry for the simple explanation, I'd be able to give a much better one in German. In English my terminology is a bit lacking^^
KHlover said:
Boiling water doesn't break haydrogen bonds. |
? I'm pretty sure it does.
LemonSlice said:
? I'm pretty sure it does. |
Breaking the bonds of the water molecule would result in a fission of the water molecule
12/13
(Yes I feel terribly embarrassed about the atmosphere question)
Doesn't really prove "smartness," though. It proves whether you're aware of most grade school concepts or not, and in that category, I'm sure most of my fellow countrymen are vastly outmatched.
KHlover said:
Breaking the bonds of the water molecule would result in a fission of the water molecule 2 H-O-H (l) -> 2 H2↑ + O2↑
This is what you achieve with an electrolysis. Adding thermal energy to the water simply speeds the molecules up to the point where they have enough energy to overcome the dipole-dipole interaction keeping them in formation, thus being able to move freely. The water changed its aggregate phase from liquid to gaseous, the gaseous H2O emerging from the bottom of the pot is what causes the boils on the surface of the water.
|
AKA hydrogen bonds.
LemonSlice said:
AKA hydrogen bonds. |
Like I said, my terminology...(blush...). Didn't make the connection from Hydrogen bridge bonds (...)...
Still, these bonds are not physical bonds between the water molecules. They are nothing more than an attraction between the molecules caused by the molecular structure of water, thus they are "overcome" and not "broken", the water molecules themselves stay intact, thus it.is.not.a.chemical.reaction.
| spurgeonryan said: I so wanted to say Oxygen. But I knew it was incorrect. Isn't it against human nature to not vote for Oxygen though? do we want to be breathing Nitrogen? No. |
Be happy it is mostly Nitrogen. Too much oxygen would kill you (and us all).
KHlover said:
Like I said, my terminology...(blush...). Didn't make the connection from Hydrogen bridge bonds (...)... Still, these bonds are not physical bonds between the water molecules. They are nothing more than an attraction between the molecules caused by the molecular structure of water, thus they are "overcome" and not "broken", the water molecules themselves stay intact, thus it.is.not.a.chemical.reaction. |
Aren't they still caused by the interaction between (slightly) positively and negatively charged atoms, thus a chemical bond?
| RolStoppable said: I got everything right. The last question was definitely the hardest, because I had no idea what "fracking" even means. Had to decide between "coal" and "natural gas", because these two seemed the most likely. Also had no idea what the English word for "Stickstoff" is, but got there through a process of elimination. Anyway, it was an easy quiz. Multiple choices don't require you to know the right answer, as long as you know what is a wrong answer you can't fare that bad. And many of the choices weren't tricky stuff, but rather blatantly wrong. |
I also had problems to identify 'Stickstoff', but I used leo.org for translation to get the answer right. 
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