I was interested in the Arrhenius relationship wrt the decay rate of magnetic material that is found in tapes and hard drive disks such how the temperature of the surrounding environment can impact the integrity of the data stored for long-term preservation since it is becoming more and more practical to use magnetic disks in order to store data, as opposed to optical solutions. It is good to recall this kind of video in study. :)
So, how do I calculate both the frequency factor and the activation energy? I have k and T so far and some data I used to get the rate laws. I'm stuck here.
Hey guys, I'm doing a lab report on the reaction H2C2O4+KMnO4+H2SO4. We had some beakers whose solutions varied in their temperature. On another we added the catalyst manganese sulfate and observed that that reactions time to complete equaled that of around 34 degrees C. I thought that if I could calculate the energy that the reaction + 34 degrees made, then I would have the activation energy for the catalyst. Can I use the Arrhenius equation and if so, how do I find what order this is in?
Molarity IS a temperature dependent term! molarity is no. of moles/litre. As you increase the temp. the volume increases, thus decreasing the concentration.
Maybe. Point well taken. I would add another factor: the online lectures are specific single topics. Classes have broader scopes set by the accredation 'gurus' (read: traind apes). The big picture usualy come at the cost of sacrificing deapth. Mostly we go to school for the wallpaper (the diploma - supposedly our ticket out of starvation) and we do the online lectures for deeper insight (and fun). (between me and you - many teachers, e.g. my H.S. chem teach, are drunk and should be fired)
waht i came for is how the reaction rate actually varies with increase n decrease of temperature. no video is about that. everyone is just explaining what each term in equation stands for :-(
@drmariawaris lmao exactly right lol.... my teacher was explaining this topic for a staggering 5 hours... -,- and nothing went into my head lol... all the students were like what?? :/ and then i said USE UA-cam lol...........................and they were like NYC IDEA. I am never coming to school again
Agree 100%. That's the mark of a GOOD teacher. That's why I come on UA-cam, lots of average teachers out there...
Keep going mate!!! This channel is a boon for all the folks who finds chemistry tough !!!
Well done
Thank you soo much for all of these videos. I am studying pharmacy..and i have learned chemistry just from you..you are the best.
hows pharmacy?
these videos really help a lot. thank you very much
I was interested in the Arrhenius relationship wrt the decay rate of magnetic material that is found in tapes and hard drive disks such how the temperature of the surrounding environment can impact the integrity of the data stored for long-term preservation since it is becoming more and more practical to use magnetic disks in order to store data, as opposed to optical solutions. It is good to recall this kind of video in study. :)
one mistake. u said 6M conc would remain same at all temp. however conc changes with change in temperature as molarity is temperature dependent.
A big thumbs up from this guy! Keep at it and maybe you'll find a cure for the common cold!!!!! :)
So, how do I calculate both the frequency factor and the activation energy? I have k and T so far and some data I used to get the rate laws. I'm stuck here.
Draw a graph that relates lnk vs 1/T. The slope is activation energy. Sub into
lnk = -activation energy/RT +lnA and solve for A.
A is frequency factor
u dont need to draw a graph. Take: Ea = [-R*ln(k of T1)/k of T2))] /(1/T1) - (1/T2). i hope u understand it
well taught thanks !!!!!!!!!
You are awesome!!
Very helpful
thank you so much it was really helpful and reduced the problem.
You're very welcome! Thanks for watching! 😀
Hey guys, I'm doing a lab report on the reaction H2C2O4+KMnO4+H2SO4. We had some beakers whose solutions varied in their temperature. On another we added the catalyst manganese sulfate and observed that that reactions time to complete equaled that of around 34 degrees C. I thought that if I could calculate the energy that the reaction + 34 degrees made, then I would have the activation energy for the catalyst. Can I use the Arrhenius equation and if so, how do I find what order this is in?
Thank you so much!
You're very welcome! Thanks for watching 😀
this is GREAT
very helpful!
Glad it was helpful! Thanks for watching!
You are a real help
thankyou for sharing!
And paying a small fortune to be taught by these teachers while UA-cam is free! Very sad indeed
Molarity IS a temperature dependent term!
molarity is no. of moles/litre. As you increase the temp. the volume increases, thus decreasing the concentration.
yes u r right sir
but why should temp dependence lie on k plz tell
Only with the gaseous phase reactions. If liquid phase(with no phase change) is there, then its independent.
An example calculation would have been very useful, please
It's not really a constant if it changes.
How
when do we use 0.008206
We use 0.081......when we use the ideal gas equation.
there's a mistake in the video, Ea should be in unit J/mol
It's really the same thing.
bruce law i think u not known that j can be converted to kj by dividing it with 1000.
my blood calculator can't calculate the equation for me. DAMN, I WONDER WHAT GONNA HAPPEN IN EXAM :"( but anyway, GREATLY APPRECIATED VIDEO :D
Maybe. Point well taken. I would add another factor: the online lectures are specific single topics. Classes have broader scopes set by the accredation 'gurus' (read: traind apes). The big picture usualy come at the cost of sacrificing deapth.
Mostly we go to school for the wallpaper (the diploma - supposedly our ticket out of starvation) and we do the online lectures for deeper insight (and fun). (between me and you - many teachers, e.g. my H.S. chem teach, are drunk and should be fired)
Thank you
You're very welcome! Many thanks for watching 😀
thank you!!
that diagram is for exothermic reaction not for endothermic...
thank u so much!!!
Belul Bereket
2 People failed their chem test.
waht i came for is how the reaction rate actually varies with increase n decrease of temperature. no video is about that. everyone is just explaining what each term in equation stands for :-(
@drmariawaris
lmao exactly right lol.... my teacher was explaining this topic for a staggering 5 hours... -,- and nothing went into my head lol... all the students were like what?? :/ and then i said USE UA-cam lol...........................and they were like NYC IDEA. I am never coming to school again
AP CHEM FTW!!!!!!!
What is ap chemistry? Im learning this for basic chemistry lol
will you please just sit my exam for me :)
Thanks
howd that exam go ? lol
STOP SAYING KELVINS!!
who cares? we know what he means, that is the purpose of language.
That's what they're called, dude.
I think he was saying that it shouldn't be plural, but who cares right?
Oh I certainly don't care. That's for sure. But that's interesting to me, because I've always heard it pluralized with an "s".
***** It's like saying 39 Fahrenheits