[e16]

What did you guys put for another gas that was produced in the limestone kiln?


This was posted from The Student Room's iPhone/iPad App

[tingirl]

How did everyone find the exam?
I thought it was actually better than I expected. Annoyed that on the 5 mark ethanol question I totally forgot to mention food prices/growing food

(Original post by e16)
What did you guys put for another gas that was produced in the limestone kiln?

There were two questions along those lines weren't there? For the first one I think I put carbon dioxide. For the other gas I think I wrote water vapour? Because water is produced in both thermal decomposition of calcium carbonate and the combustion of hydrocarbons... I hope that's right???


What did you guys write for part a) of the question about dry air? (I think it was why is nitrogen more dense or something, I didn't have a clue what the answer was!)

[MrDude151]

(Original post by e16)
What did you guys put for another gas that was produced in the limestone kiln?


This was posted from The Student Room's iPhone/iPad App

I said nitrogen because its in the air and it won't react because it has a triple bond. Not sure though :/

[patti_bubz]

ummm for gases produced in the kiln i put nitrogen oxide - high temps.... and there is a lot of it becuase there is a lot of nitrogen and oxygen in the air

[alisha082]

for the main other gas produced by the limestone and the kiln, i wrote calcium oxide cause if you think about the lime cycle, it made sense to me.. and for the reason i wrote, cause limestone is mainly made up of calcium carbonate so when you heat it up in a kiln, it forms calcium oxide

[LittleMissRawr]

Calcium oxide is a solid Alisha082 :P. I put nitrogen because it is in air but I don't really know. Plus it is largely unreactive as a gas.

Tingirl, I put about the fact they only removed oxygen and carbon dioxide, leaving all the noble gases, of which argon was mroe dense than nitrogen itself, thus making the dry air nitrogen they isolated denser than pure nitrogen .

[ma1996leb]

The last last question was wierd two gases which dont seperate properly

[Mihawk Gallio]

I'm definitely going to get U-E