Allotropes and the like (1 Viewer)

[PopcornPixie]

Hey guys!

I found a little probelm with O2 and O3 comparisons and stuff-

In conquering chem there's a fairly detailed table outlining the
differences and similarities of both chemical and physical properties
of the two allotropes, and above the table, there's this paragraph
discussing the different chemical properties.

But in Success One, an answer to a multiple choice answer states that
allotropes have different physical properties, but the same chemical
properties.

Which according to conquering chem is wrong.

But somewhere in my notes i've managed to write down that O2 and O3
have the same chemical properties- which is from a different book,
altogether.

can anyone clear this allotropes and their physical/chemical
properties thing up!?

Thankyou!!

 

[Xayma]

Graphite and Diamond are allotropes, do they share similar chemical properties.

Graphite is a good conductor, diamond is a very resistive semiconductor and even then it requires flaws inside it.

 

[~*HSC 4 life*~]

Hey guys!

I found a little probelm with O2 and O3 comparisons and stuff-

In conquering chem there's a fairly detailed table outlining the
differences and similarities of both chemical and physical properties
of the two allotropes, and above the table, there's this paragraph
discussing the different chemical properties.

But in Success One, an answer to a multiple choice answer states that
allotropes have different physical properties, but the same chemical
properties.

Which according to conquering chem is wrong.

But somewhere in my notes i've managed to write down that O2 and O3
have the same chemical properties- which is from a different book,
altogether.

can anyone clear this allotropes and their physical/chemical
properties thing up!?

Thankyou!!

success one is correct in saying, physical properties vary btw allotropes, but their chemical properties are the same- it is because they are different physical forms of the same element (same electronic configuration of atoms means same chem properties)

 

[nit]

As Xayma pointed out, allotropes have different physical properties and can have remarkably different chemical properties - take diamond and graphite. Graphite can be reacted with nitric acid to form benzene and its derivatives, while diamond can not undergo these sorts of rxns at all. Even simpler, the bonding in each is a dead giveaway that chemical properties just can't necessarily be the same between allotropes.

 

[PopcornPixie]

Ok, thanks guys.

2 different answers, again -.-

but, all good.

i'll go with the different chemical properties one, because it seems to make the most sense- and more people say the chem properties vary.. =) success one must be wrong... again.

Anyway, thanks again!!!

 

[angelicdevil]

hey guys. im about to do my hsc chem exam and i just read that success one is wrong on the allotropes.. that being: allotropes have different physical properties but the same chemical properties. in my text book this is what it says aswell. so if this isnt the correct answer, what actually is?

 

[Paroissien]

Well as Xayma pointed out earlier there is no reason any properties should be similar. I like the example of oxygen and ozone, and they obviously have markedly different physical AND chemical properties.
Are you looking at a specific HSC question?

 

[Xayma]

Allotropes can posses different chemical and different physical properties. After all nanotubes function differently to Diamond which functions differently to bucky balls, which react with water.

 

[angelicdevil]

i see ur point and i agree that u r right, i was referring to the hsc question in success one about what an allotrope is... if the same sort of question was to appear again as a short response... what would i put?

 

[Paroissien]

I think of it as the same element in a different form, but that wouldn't be best for the HSC.
A dictionary definition is : any of two or more physical forms in which an element can exist.
So I would say allotropes of the different forms an element can exist in, then use ozone and oxygen as an example, depending on the length of the question

Sorry if that isn't too clear, but I am damn tired.

 

[angelicdevil]

thanx guys.. it helps!