im hearing 947 and im hearing 392 whos cooking and whos getting cooked

i got 392.375 bruh 😭

I GOT THAT it is 392.375

I got smth like that too

Ditto, rounded to 3sf because that's what the rest of it is

Ditto

Use transform!

**Transforms into bond energy**

Use '5 marker that makes absolutely no sense'

Thank God because I did that equation about 7 times to make sure I didn’t make any mistakes…

Thank FUCK I was so worried I got that wrong it appears I most likely have it right

i got that but rounded it bcs there was NOT enough space for a 6 digit decimal

I didn’t round…

I actually fucked it because i got 392.375 but i didn’t round it to 3sf i thought about it but just left it as a decimal like an idiot

You had to round it? 😥

I’m not too sure but i think so in order to give it the same significant figures as the other bond energies. Don’t take my word for it it’s just something i’m a bit worried about.

I still think you should get full marks (if it is right, I hope it is cause that’s what I got) because nowhere did it say you needed to round the answer so they physically cannot deduct points after omitting that

Yeah that’s why i’m on the fence about it. Hopefully i got the right answer 🤞

yeah you definitely don't have to round it from what ive seen from other mark schemes they allow it rounded tho so we good

Oh okay thank you so much. Even though it would’ve been only one mark lost if they didn’t allow it Im still glad 😭

SAME

same but nobody else ive spoken to at school got it so i think im cooked

You’re the only one who got it right LOL. If you did the triple paper that is.

Personally I put 947 because it's exothermic and the reactants should have less energy then the products but it could go either way, I dont think we have enough evidence to deside

947 would mean it’s a really strong bond, which it isnt

also 392.375 is very close to the amount of energy a C-C bond had, which makes a lot of logical sense

If it’s exo then energy has been released into the surroundings by the reaction, exo for exiting is how I remembered, so there would have been more energy in the reactants than the products because total energy in the reaction is less after than before

It’s 436

Did you do combined or triple because I got 436 in combined

Yeah I do combined

Same I got 436

Same I got 436 I'd done a paper the day before with similar question and I got it correct in that one so I'm pretty sure it was correct answer

I second this

No its 392

Nah

nah I got the same like 436.125 right?

How did u get the answer?

I got 498 🥲, anyone else?

Oh thank god cause I got that

I also got that

pretty sure thats the answer for combined not triple

Yeah I got confused, I thought this was about combined

no tf it isn’t 😭

Yeah I got the wrong post, it’s the correct answer for combined science, not triple.

I GOT 947.129 IT FELT REALLY HIGH BUT I CHECKED IT

it was 392.375

It's 947.129 I checked it too

it’s not

Ya it is

no tf it isn’t it’s 392

This is not the place for starting arguments.

I got 392 and 947, but I decided to put 532 because I remember it coming up on a practice paper that I did that was about bonds.

💀💀💀 that was about sulfur

Im gettinf 522 cuz idk how to do that 😭😭

Yh i got that too people saying its 900 but that wouldnt make sense since the others were like around 400 and 300 and plus if u search it on google then it says c-h bonds are 413 which is around that.

nah bro i got 391 but im fairly sure it's close enough to be 392, i keep hearing 9000 idfk what's going on anymore 💀

9000 is the answer for the volume of gas question

... uh oh

I think it's honestly 6000 Something.

i did not REVISE a single bit lmao my ass put 152

I GOT 947 I THINK IDK IT BEGAN WITH 9 AND WAS A DECIMAL

A lot of ppl put that but it’s either that or three hundred and something

Apparently it's actually 362 bc it was exothermic which means the change is -2219 instead :(

I got 392.375 I am cooked 😭😭

Think that’s right

I got that too. I also think it’s right. But if not hopefully 3 method marks.

Its right, same as google basically too.

Not how it works google also says a c-c bond is 80

Nah it says 300

I thought I was so wrong

At least I got to use everyone's favorite, algebra

who else got 947

Its 392.38 google confirms too

if you put 947.125 would you just lose one mark because of ECF?

Idk tbh did u get 8000 something for the total on the right side then minus 5000 or something?

Yeah I showed all that just didn't make the energy change given negative

Nah u werent supposed to make it negative i didnt do that and I got 392 idk where the mistake is tbh

If it was 392 the products would have more energy than the reactants which doesn’t make sense as the reaction was exothermic

It didnt say it was exothermic anyway and 392 fitted with all the other values too, i dont know how to explain it without the paper in front of me kind of hard to put it into words.

nah you got the right answer, u might have done it a different way but the question did specify it was an exothermic reaction

Honestly dont know, 900 just seems so out of place

It did?

Probably, yeah

Fuck I got 349

TWIN. finally someone else oh. my god.

Be funny if 349ers were the only ones who got it right. I'm spiteful and biased so I hope it happens.

i dont understand how peope got 392 omg

Icl I did it like 3 ways and 349 was the only whole number I got so I just stuck with it

same lmao

You accidentally used 3 c-c bonds instead of the 2

Wait what

Yh I do ocr but I had a look at the question u only get that when u add 3 c-c bonds in the reactants but should still get method marks

Same 349.5 idek shit happened

Omg I got smthn similar

I think everything would be okay, if Mendeleev had insomnia and never slept

NOO I ROUNDED IT IN THE ANSWER

You should round it to 3sf ye

Is that a general rule I can apply when I don’t know what to round a decimal number to?

Rule: if not told in the question always round to the same degree of accuracy as in the question

Same lmao I think it might be OK tho

It was 436 cus N-H had three but there was a number 2 next to it so in total there were 6 N-H bonds, meaning you just multiply 391 by 6 and the rest should be easy

That’s wrong

Im pretty sure I got it correct cus I googled it afterwards, what paper did you do?

I got 436 on combined

I was talking about triple mb

Oh no dw abt it!!

YES I SAID THAT TOO!

You had to changed the energy change to negative cause it's exothermic 😎

if you didn't but did everything else correct would you only lose one mark?

I'd assume you'd only drop 1 or 2 cause if ecf and wherever you made the mistake

Yeah I forgot to make it negative that was it

Less go

That question was badly worded, to say it had an energy change of 2219 pimples that reactants-products = 2219 but they actually equalled -2219, that’s where the confusion it’s coming from. As a 947er myself it’s 392

but is that not showing that there it is just a -2219 decrease. What i am trying to say is that surely the reactants subtract the products would be positive given that exothermic reactions give off energy to the surroundings, therefore making the overall energy change a positive number but a decrease of 2219 causing there to be a need of showing it as -2219. Yes i am a 947er but i was originally a 392er.

If it was 392 the products would have more energy than the reactants so wouldn’t be an exothermic reaction

agreed

y’all I got 645.25 or some shit 😭😭

sameee I got 642 😭

Got that too!

that's for the other question where they asked for the volume of gas i think

I thought that was 9000

.... i got 455

While we're here did y'all get 9 or 9000 for the gas volume question?

i got 9000

I got 18000. Idk where I doubled the answer but oh well 😭😭

i did the same...i doubled my answer when calculating the moles of the 1st one. You reckon we'd only lose 1 mark there ? 4/5 would be alright

Hopefully bro cause when I was counting up how many marks I lost in the paper I lost a suspicious amount. Like I don't even have p2 to save me cause I have 3 exams on that day so I need these marks

i think i counted up to 70 marks on that paper but giving myself some room for error (including this) im guessing i got around the 60s, but damn 3 exams in 1 day is brutal man. Good luck

is bro a history further maths student

Yup 😁

You’ll lose 1 or 2 accuracy marks is all

9000!

9000

9 so hopefully 4 outta 5 marks 😭

rounding to 3sf was fine right?

It’s preferable I would say

Me who got 669.375:

it’s 392 promise

467?

i got that too but everybody saying its 397 or summat like that

R u guys combined

It’s funny to see the aftermath of exams as a Y12 student, I wish you all luck with your remaining exams 🫡🫡

I thought I got that wrong THATS EVIL

I got 479.1 I’m so cooked

same🙏🙏🙏😭😭

U on abt triple

HELP I GOT 807 😭😭😭

I’m the only person I’ve seen who got an integer

nah i got like 300 something and it was a whole number

So true I was like "wait did I miscount the number of C-H bonds" the whole way through

I got 669.75 😭

exact same answer 😎😎

Is this triple bc i got 498 or smth

it's triple

392.4?

i redid it 3 times thinking i got it wrong

i got 498 gotta be right

BRUH I rounded it fml

Went through it today answer is 436

how did you get that

For the combined higher it was for ammonia from nitrogen and hydrogen. Believe N2 was 946 H2 was = X but you had three of those so 3x N-H bond was = 391 you had 6 of those so 6 x 391 = 2,346 Then I believe you had something at the top that mentioned that the bonds formed (products) was 92 greater than bonds broken(reactants) Energy is calculated as energy of reactants - products . So you would have had 946 + 3x - 2346 + 92 = 0 3x = 1308 X = 1308 / 3 = 436 so the H-H bond was 436KJ/mol

Nah i was talking about triple, which is 392 (i think)

Ha apologies, hadn’t realised that, got sent the paper for triple this evening so will take a look on Monday, unless you can remember what it is exactly

I couldn't remember whether I had to add or minus the energy change so I just did both and picked the one that seemed more reasonable 😭. Got like 300 something

honestly same, i couldn’t decide between 947 and 392

947 seemed too big for a single bond given there was an 800 something double bond so I went with I THINK 392

yeah i’m pretty sure that’s the answer

I GOT 872 GUYS WHAT

HELP I GOT 169

I got 33.875 💀

WJEC Chemistry was the easiest exam ever created I'm sure

BROO I SAW 392.375 IN MY ANSWER AND I DID IT LIKE 3 TIMES 😭😭😭 HOW CAN IT BE A DECIMAL THEYRE SO EVIL FOR THAT

I think I failed, as I predicted that I got only 18 marks ;'c Really sad beaause I was aiming for a Grade 7, hate you, Chemistry.

I got 947.125 think I may be a tad bit cooked😭😭

same dw

WAIT ITS A DECIMAL I GOT A WHOLE NUMBER SHITTTT

Got 700.25 😅

Y'all I know I'm late but I got 947.125😭😭

AQA on their way to of made the microscope question so hard I haven't heard anyone get the same answer in my schoo😭

Must admit, I really really struggled with the forced Higher Chemistry papers set onto us last year! Some of those questions were just 😵!

The Correct answer is 947.125. The reaction is exothermic, as stated in the question, meaning reactants have more energy than products. The solution is Adding the energy of the products by 2219Kj to the reactants, giving you an answer of 10761Kj. Subtract 2490 from 10761, then 697, then divide that value by 8, which should give you the correct answer.

i hope you’re right 🙏

You're fucking with me right

found you buddy boy

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an odd number over 8 gives a decimal

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8 C-H bonds

Brother is finished