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Thread: A-level chemistry
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x-samia-x

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Salaam,

is anybody doing/has done a-level chemistry nuffield?

cos i'm finding it quite difficult, and wondered if any1 had any tips or anything?

jazaka'Allah khairun

walaikumasalam
samia
 
Wa Alaykum Assalaam,

I'm sure we have some science threads in this section, and that there are quite a few people who've done A-level chemistry.

If there are any specific questions or problems, feel free to post them and Insha'Allaah someone can try and help.

I think it goes for most subjects that they initially seem daunting, but if you put effort into it - ask the teacher, friends and read books available to you, you will find that you can do well with the help of Allaah (swt). And remember to place your trust in Allaah (swt) and constantly ask for His help.
 
OOh....

Hess's law.

Just do the triangles.

Remeber not to forget the negative values for the equations going in the other direction.

Other than that...its quiet simple really. Just practise
 
Its ok...

Right:

Hess's law is about energy conservation.

Enthalpy change is jus a posh word for loss or gain of heat.

Delta H is is the change in Temp.

When you understand the calculations and the numbers are inserted into the triangle (like they show in the book , well i think), Its just maths.
 
I did AS chem and sat in every lesson not understanding anythins.

If your doing salters-nuffield which is the one I did theres this really good revision guide that explain each and every equation step by step. Its costs about £10 but its worth every penny as it covers all of the practical aspects of the syllabus.

Im not doing it for A2 and everything I did for AS has just flown right over my head so I cant be much help. Sorry.
 
al_islam said:
Its ok...

Right:

Hess's law is about energy conservation.

Enthalpy change is jus a posh word for loss or gain of heat.

Delta H is is the change in Temp.

When you understand the calculations and the numbers are inserted into the triangle (like they show in the book , well i think), Its just maths.
Click to expand...


remind myself of the triangle i think.. even tho i spent ages 2day trying to figure it out.. thank you. jazaka'Allah khairun

Starseeker

i is doing Edexcel nuffield. cud use a book explaining equations, would be reli helpful! wots it called? thank you for your reply Jazka'Allah khairun
 
I know exactly what you guys are talking about kay:
Please please, dont all PM me at once...

Aslamualaikum
 
salam sister samia, i had the same problems with chemistry!, to me it was like reading japanese upside down!, my first year i failed, i am currently resitin it agian , but now am using CGP revision guides RELE RELE helpful, am doin WJEC btw, which is also quite easy, soo if i was you go to the nearest book shop and get your self the coolest book!!! ( no i dnt get paid to do this)
 
Hamada said:
salam sister samia, i had the same problems with chemistry!, to me it was like reading japanese upside down!, my first year i failed, i am currently resitin it agian , but now am using CGP revision guides RELE RELE helpful, am doin WJEC btw, which is also quite easy, soo if i was you go to the nearest book shop and get your self the coolest book!!! ( no i dnt get paid to do this)
Click to expand...

japanese upside down.. i can so relate! wots wjec?
for edexcel nuffield.. thers one text book (which my sixth form has invested in.. but i dont find helpful) and one revision guide which isnt detailed.

but the people r reli helpful on here, masha'Allah
 
Wjec is the board they tend to use in Wales, similar to OCR, but the CGP revision books covers all the major syllabusses including nuffield its very clear written and with alot of picture(i love the pictures) and sum cracking jokes to i bought mine for uhmm 9.99 to be precise! salam
 
Ok,

the triangle is jus where the compounds go and where each of the enthalpies are listed.

just makes it easier to calculate.

it has 3 compounds and their enthalpies....bt u got to know if its positive or negative.

when u do...u jus use maths to solve it.

ps remember to use a negative sign for the reaction going in the oppostie direction.
 
al_islam said:
Ok,

the triangle is jus where the compounds go and where each of the enthalpies are listed.

just makes it easier to calculate.

it has 3 compounds and their enthalpies....bt u got to know if its positive or negative.

when u do...u jus use maths to solve it.

ps remember to use a negative sign for the reaction going in the oppostie direction.
Click to expand...


sorry for late reply
ive been revising!

ahhh yeh, i get it now. sort of. thank u!!!!
well, sort of get it.. more practise questions i guess =/

jazaka'Allah khairun!!!

Samia
 
al_islam said:
ps remember to use a negative sign for the reaction going in the oppostie direction.
Click to expand...
I thought a negative enthalpy refers to exothermic reactions...
I am not familiar with the anglosaxon chemistry levels though. I have no idea what triangles are supposed to be, I suspect they're some sort of tables with data?
Delta H is is the change in Temp.
Click to expand...
Delta H is a change in enthalpy - energy. Delta T is a change in temperature.
 
ok im lost again.
isnt negative... if its going in the opposite direction.. orrr if thers an increase in temp?
and delta H energy change/mole?