Zumdahl kineticsmarathon

Idk ismein marathon wale question mein first table or second table dono hin bilkul alag se lag rhen h...dono ka r.o.r. hin alag h...so idk how to even get at the first question done...sorry feeling dumb 😕
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63 Replies
iTeachChem Helper
@Dexter
iTeachChem Helper
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+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.
Sephrina
Sephrina2w ago
tell the page no. ill open in my laptop its not clear here
Shhh
ShhhOP2w ago
592 Paanch sow bayanveyyy
Sephrina
Sephrina2w ago
this one?
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Sephrina
Sephrina2w ago
which que in it?
Shhh
ShhhOP2w ago
Marathon
Sephrina
Sephrina2w ago
92?
Shhh
ShhhOP2w ago
Yh
Sephrina
Sephrina2w ago
this whole
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Shhh
ShhhOP2w ago
That one only
Sephrina
Sephrina2w ago
a is asking to determine the rate law right so
Shhh
ShhhOP2w ago
So!?
Sephrina
Sephrina2w ago
so wait no lemme type out im having confusions
Shhh
ShhhOP2w ago
I just wrote chx3 to the power a * y to the power b *k as the ror
Sephrina
Sephrina2w ago
im also in mid of this chap only
Shhh
ShhhOP2w ago
But I am at the end... Of my jee prep😭🥲and still having such silly Confusions
Sephrina
Sephrina2w ago
we can get tht its first order rxn
Shhh
ShhhOP2w ago
How first ordrr
Gamertug
Gamertug2w ago
what confusion
Sephrina
Sephrina2w ago
because of the given data calculate slope its linear relation
Shhh
ShhhOP2w ago
Wow how did u calculate slope for every 2 different vals I m getting the different ans
Gamertug
Gamertug2w ago
which question
Sephrina
Sephrina2w ago
i to applied from how i solved of the ques i did wait ill show
Shhh
ShhhOP2w ago
Marathon question ...question no. 92
Sephrina
Sephrina2w ago
use only experiment once
Shhh
ShhhOP2w ago
Y y
Sephrina
Sephrina2w ago
then use second
Shhh
ShhhOP2w ago
TvT
Sephrina
Sephrina2w ago
The linear relationship indicates that as time increases, ln[CH₃X] decreases at a constant rate. this is for the first order so thts why it is first order one
Shhh
ShhhOP2w ago
But I don't think it's of the first order
Sephrina
Sephrina2w ago
how
Shhh
ShhhOP2w ago
Moreover the Y will also keep changing... N how the hck did u compare ln values via calc!? Sry if it sounds rude
Sephrina
Sephrina2w ago
intution 😭
Shhh
ShhhOP2w ago
Say straight forward mam that we r taught for only 1st order yet 😂 Jk don't mind me
Sephrina
Sephrina2w ago
nah nah thts not the thing intutively i think it will be first order
Shhh
ShhhOP2w ago
Beautiful intuition...hope u don't take it to the exams See I can clearly even help u understand how u can't even say it's not first order using the table...notice the half life period...it will be at around 3.57 as ChX3 which lies somewhere just more than 1.5s...now after the next 1.5s it will get 0.25* the initial value i.e. 7.04 which isn't even true...so that's how things r done Oh my bad well we don't even know the initial concentration of ChX3 wow🥲😭😂
Sephrina
Sephrina2w ago
isnt 3 M given
Shhh
ShhhOP2w ago
So ig what we just know now is we can only use the calculator find log a/t at each point and then if k remains the same then we may conclude yeah it's of first order
Sephrina
Sephrina2w ago
yeah i mean we could
Shhh
ShhhOP2w ago
3M is given as the value of Y and the change given is of ChX3
Sephrina
Sephrina2w ago
wait oh yh
Shhh
ShhhOP2w ago
Try try if no other way is found we might ask @iTeachChem sir
Cakey Bot
Cakey Bot2w ago
iteachchem
Transcription requested by Shhh
I sure sure check it out at a higher temperature matlab what will happen to rate constant would increase that is the obvious thing One weird thing that could happen is that the first order could become zero and zero could become first but I don't know if that is what is happening मैंने detail mein देखा नहीं है try करेंगे देखो अगर कहें डगते तो सभी बताना
Shhh
ShhhOP2w ago
Nhin sir vo temperature is given for the c part of the question...I tried using that but just got Ea(1/T2-1/T1)/R= ln k1/k2 @iTeachChem sir bta dijiye nhin ho pa rha h...pehla question hin... *92 ka pehla part hin
iTeachChem
iTeachChem2w ago
have you tried plotting on desmos?
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iTeachChem
iTeachChem2w ago
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Shhh
ShhhOP2w ago
Oh nooowh ky Mtlb ho skta h iska Kl dekhenge sir good night 🥲🫡🙏🏻 Graph se toh kuch smjh nhin aarha h sir
iTeachChem
iTeachChem2w ago
Doesn’t this show first order?
Shhh
ShhhOP2w ago
Mtlb ho toh rha h bs negative of time m bs kese plot hogya that's the thing...or maybe aap hin at t=1 ko t=0 pr equate kr diyen honge
iTeachChem
iTeachChem2w ago
na na ignore the -ve time wala thing see it says the conc is 4.5 x 10^-3 at t = 0, wahi toh plot kiya hai
Shhh
ShhhOP2w ago
Oh haan ol *ok Um...kl dekhten h sir ab... Lekin ismein ky graph plotting aise kr ke hin ans niklega!? As beautiful as the intuition did by this gurl
iTeachChem
iTeachChem2w ago
Let's stay on point please
Shhh
ShhhOP2w ago
Sir hum toh aise hin bolen then...vo bhi graph n unka intutions k baare m...if u say won't txt anything as such from the next time 🫡
Shhh
ShhhOP2w ago
Sir ek baar dekh kr bta skten h sahi h ya galat kyunki confusion abhi bhi thore bohot h like 85° C pr order yahan pr change nhin kiyen h hum but it might happen ki vo zero bn gaya ho or SMTH... moreover signs ka hum khaas dhyan nhin diyen cuz Ea ya k negative m ho ya positive m magnitude hin generally puchha jata h n?
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iTeachChem
iTeachChem3d ago
Long q I know :p @Shhh

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