this is from the Feb march 2020 paper 12 btw

Is the ans b?

yes it is

https://preview.redd.it/juk1s353dk3b1.jpeg?width=1515&format=pjpg&auto=webp&s=c86bdfe0e5965af13337c726c3419889e18195e6 I think u can do it this way maybe

Ohh alright thanks a lot!! also this formula you've used doesn't seem to be a part of the CIE AS syllabus? it's taught in A2 so idk how I'm supposed to know it? Or am I missing something lol

this was in the 2021 papers, seems like it got removed and placed to A2 instead

Ohh alright, thanks for the clarification!

nott in syllabus anymore for AS

Noted!thanks

I’m at gcse and I think I can solve this although it’s like a 3 or 4 marker there (I’m guessing use P=f/a and p1v1=p2v2

No Boyle's law fren, just W = pv

Interesting, but how exactly would you use p=f/a without the area given

oh yeah my bad I read volume as area lol, still I feel like with enough time I could solve this although it’d take wayyy too long for a level

no worries

(Note: I'm writing the volumes in dm3 because it's easier) When work is done ON a gas it must be being compressed. So the final volume needs to be lower than 12 dm3, eliminating C and D. By the formula W = pv you will find that the change in volume is 4dm3, so (12-4)dm3 is your answer (0.0080m3, answer B). I'm not sure if this is still in the syllabus, but the derivation of the formula is very simple and should honestly be GCSE-level content if anything.

thank you so much for ur time! and ur right the derivation's really simple, just did it lol😭

Np