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Topic: Chemical and physical reaction  (Read 847 times)

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Offline Bobixtt

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Chemical and physical reaction
« on: January 08, 2021, 06:31:26 AM »
Hi everyone!
I'm writing two reports and I got doubt, I know it may sound stupid, but my colleague confused me and I need clarification  :)

The two reactions I'm analyzing are:
1) dehydration of sugar with sulfuric acid
2) Reactions of lithium with air

In my opinion they are both chemical transformations, not just physical, in fact the first one is an elimination reaction and a second one is a combustion. Am I wrong? Thank you all for your help

Offline Borek

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Re: Chemical and physical reaction
« Reply #1 on: January 08, 2021, 07:09:22 AM »
In my opinion they are both chemical transformations, not just physical, in fact the first one is an elimination reaction and a second one is a combustion.

Sounds OK to me.
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Offline AWK

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Re: Chemical and physical reaction
« Reply #2 on: January 08, 2021, 08:50:01 AM »
Lithium reacts with both oxygen and nitrogen in the air.
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Offline umut

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Re: Chemical and physical reaction
« Reply #3 on: January 12, 2021, 05:18:04 AM »
2) Reactions of lithium with air

When lithium reacts with air, only combustion does not occur. We can talk about 2 reactions:
4Li + O2 → 2Li2O ( combustion reaction )
6Li +N2 → 2Li3N2 ( Synthesis reaction )

The rest of the post, you are right :)

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