Chemistry Question: (1 Viewer)

[iEatOysters]

Hello, can someone help me with this question? D:

The gas chlorine (cl2) and ammonia (NH3) are easily distinguished by their odours. If a canister of each had their tops removed, which odour would you smell first? Explain.

Thanks in advance.

 

[Riproot]

Chlorine.

Yay.

 

[madharris]

Chlorine?... i would think... because i think it's more pungent - i have no idea to be honest

what kind of question is that...

 

[iEatOysters]

Er... why is it Chlorine? :S

 

[madharris]

While looking it up, i found this
"6. Suppose you have two vials, one containing ammonia and containing chlorine. When they are opened across the room which would you expect to smell first and why? Hint: Graham's Law of Diffusion relates velocity of molecules with molecular mass (heavier molecules move more slowly)."

this was on a chemistry uni lecture site or something...
http://boomeria.org/chemlectures/textass2/firstsemass.html

 

[HSC2014]

The gas molecules that are lighter will travel faster. Since gas particles travel in arbritrary straight-line motion, they collide with eachother. Then applying Newton's second law, the lighter gas molecules will have a greater force exerted onto them by the heavier gas molecules --> travelling faster (I = ft)
a: Ammonia (lighter)

I hope I'm right :S

 

[iEatOysters]

Ooh, okay. I got that too. xD
You calculate the masses by using the atomic weight, right?
And thank you for the explanation.

 

[HSC2014]

Ooh, okay. I got that too. xD
You calculate the masses by using the atomic weight, right?
And thank you for the explanation.

Yep. Where'd you get the question? It's interesting haha

 

[iEatOysters]

Yep. Where'd you get the question? It's interesting haha

Got it from a friend. She needed help with it.
(not sure where she got it from)

 

[Indoz]

ammonia low molecular mass, less density... so i think its ammonia

 

[kazemagic]

Got it from a friend. She needed help with it.
(not sure where she got it from)

lol then she probs go to the same chem tutor as me

 

[Verify]

Is this the tutor in Burwood, I think?

 

[kazemagic]

Is this the tutor in Burwood, I think?

yep

 

[Indoz]

so what was the answer, and why?

 

[kazemagic]

so what was the answer, and why?

dunno lol i was a bit late

 

[kazemagic]

so what was the answer, and why?

dunno lol i was a bit late

 

[Demento1]

dunno lol i was a bit late

Ammonia. HSC2014 explained it pretty well.