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Revise Chemistry - Why are giant covalent structure solid at room temperature?

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Reply 20

Pigster

Can you have intramolecular bonds in for example diamond. Wouldn't that require the diamond to be a molecule? Wouldn't that require you to know the molecular formula?

Reply 21

Kyx

The formula for diamond is C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C-C...

Reply 22

richpanda

Original post by defenestrated

Pretty sure OP is just trying to destroy everyone's chances at academic success
:frown:

pretty sure you're in year 11 and haven't gone in to this much detail yet.

Reply 23

username2151383

Original post by richpanda

pretty sure you're in year 11 and haven't gone in to this much detail yet.

we did this in year 10

Reply 24

Awais_

Original post by defenestrated

we did this in year 10

You should know it then lol

Reply 25

username2151383

Original post by Awais_

You should know it then lol

I do
you're the one who said intermolecular instead of intramolecular :frown:

Reply 26

asdfghjklgcses

I actually really need to revise this for my chemistry exam on Tuesday😂 so thank you !

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Reply 27

Awais_

Original post by defenestrated

I do
you're the one who said intermolecular instead of intramolecular :frown:

My bad, sorry! :-)
We can be friends now. :smile:

Reply 28

Awais_

Original post by asdfghjklgcses

I actually really need to revise this for my chemistry exam on Tuesday😂 so thank you !

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Chemistry wasn't hard, i did get a B with no revision at all.

Reply 29

username2151383

Original post by Awais_

My bad, sorry! :-)
We can be friends now. :smile:

best friends 4eva

Reply 30

asdfghjklgcses

Original post by Awais_

Chemistry wasn't hard, i did get a B with no revision at all.

Yeah I agree it's quite easy!! Aiming for the *s tho😎😂

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Reply 31

VividBandicoot

Why is it INTRAmolecular? I thought all state changes had to to with intermolecular forces such as vand der waals and stuff?

"When one of these substances melts or boils, it is these weak intermolecular forces that break, not the strong covalent bonds. At room temperature, simple molecular substances are gases, or liquids or solids with low melting and boiling points."

(edited 8 years ago)

Reply 32

Awais_

Original post by defenestrated

best friends 4eva

Yup! Haha

My only friend so far.

Original post by asdfghjklgcses

Yeah I agree it's quite easy!! Aiming for the *s tho😎😂

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Yes, definitely. Especially since I want to take it for A-Levels.

Original post by Zain-A

What year are you in? :smile:

Reply 33

VividBandicoot

Original post by Awais_

What year are you in? :smile:

I'm in Scotland mate and I'm in my last year of high school (17 yrs old) doing Advanced Higher Chemistry which is basically somewhere near 1st year uni level/ Last year of A-Levels. I don't really know how the English system works.

Anyway I've always been taught that it was the intermolecular forces that affect m.p's and b.p's. Someone explain please.

Reply 34

Awais_

Original post by Zain-A

Wait, now I'm confused, lol.

In England it's like UP to Year 6 is primary school,
Years 7 - 11 is secondary school, year 9 , year 10 and year 11 are GCSE years and in Year 11 you sit your GCSE examinations and even in year 10 for some subjects.

After leaving secomdary school you apply for sixth form college or college to do A-Levels or a course, or even an apprenticeship at 16.

Reply 35

VividBandicoot

Original post by Awais_

Our secondary school or high school has six years in it. We sit out national 5 exams (equivalent to GCSE's) in our 4th year of high school. Those who don't sit nat 5's fr whatever reason/ aren't good enough for them yet get a national 4 qualification which has no exam just an assignment. We are around 15 years old in 4th year.

In our 5th year most of us who passed all our national 5's take normally 5 "higher" subjects to study. I took Maths, English, Chem, Bio and History and got 4A's and a B. It is these qualifications universities will look at when we apply. People who didn't do any nat 5s in 4th year can use this year to do some. Most of us are 16 yrs old around this time.

Then in 6th year (where I am now), If you did well in your highers last year, you cn advance to "Advanced Highers" which prepare you for uni and is like 1st year level of uni course work. You can also do more higher if you want to.

Also if you failed a higher in 5th year you can resit it in 6th year.

A higher is equivalent to an A-Level sort of, but we do it in one year. Hence we have Advanced Highers for really smart folk who did well in highers.

We have no sixth form colleges.