Chemistry IAL (WCH12) Unit 2 January 2020 Discussion
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Original post by tryingtostudy33
i got 60 something
Kindly enlighten me how you got this result 😭
Original post by Oyu
i think mine is wrong for sure so idk
Original post by Oyu
I used q=mct. Then divided by 1000. We're we given the moles? I can't remember
We were given mass of hydrated and anhydrous salt. we were given volume of as 45.5 and 50. there was no moles idk
Original post by Oyu
I used q=mct. Then divided by 1000. We're we given the moles? I can't remember
did u use 8 for mass?
what i did was calculated q then converted it into kJ then divided it by number of moles and got kJmol-1 idk
Original post by tryingtostudy33
did u use 8 for mass?
I used 50 because density = 1g/dm^3.
Original post by tryingtostudy33
did u use 8 for mass?
No I used 50
Original post by Oyu
Wow. I am quite stupid. Messed up big time on that one
I messed up too. Problem is its exothermic so it’ll be -(whatever u got) which would affect ur Hess law result. And i forgot about the negative sign
(edited 4 years ago)
Original post by Faazusman
I used 50 because density = 1g/dm^3.
same
Original post by tryingtostudy33
I messed up too. Problem is its exothermic so it’ll be -(whatever u got) which would affect ur Hess law result. And i forgot about the negative sigb
I can comfortably say I lost a solid 8 marks
Original post by Oyu
I can comfortably say I lost a solid 8 marks
Did u find the paper harder the. previous past papers?
Original post by tryingtostudy33
Did u find the paper harder the. previous past papers?
Not thaaaaat much harder. But it was very easy to make mistakes on that paper. At least for me. All the guys I know that sat the paper said it was harder though
Original post by Oyu
Not thaaaaat much harder. But it was very easy to make mistakes on that paper. At least for me. All the guys I know that sat the paper said it was harder though
What did you write for why is it hard to measure temp in forward and backward reaction
I got the same too i think
Original post by tryingtostudy33
What did you write for why is it hard to measure temp in forward and backward reaction
idk if this is correct, but I wrote that harder because it is difficult to measure the temperature of a solid
and the backward one was endo so it was hard to know when the reaction started
Original post by tryingtostudy33
What did you write for why is it hard to measure temp in forward and backward reaction
Something about measuring the temperature change of a solid. And the disappearance and appearance of a liquid
Original post by mynameisnotvalid
idk if this is correct, but I wrote that harder because it is difficult to measure the temperature of a solid
and the backward one was endo so it was hard to know when the reaction started
and the backward one was endo so it was hard to know when the reaction started
that makes sense
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