18. Introduction to Chemical Equilibrium

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MIT OpenCourseWare

Күн бұрын

Пікірлер: 53

@AnneCalie Жыл бұрын

I really admire her commitment to her shirts!

@qu4nt0 6 жыл бұрын

I wish I was allowed to eat chinese food during lectures

@eren-sh1sq 4 жыл бұрын

no no no... please don't do that!

@andresfelipemirandarua8530 2 жыл бұрын

@@eren-sh1sq why not?

@joaonogueira3401 5 жыл бұрын

great class I could understand everything

@iro3d 3 жыл бұрын

The statement at 32:35 in incorrect. K>1 doesn't necessarily mean more products. Try to plug into this formula K=1.1 and see for yourself. (This is because we have twice more reactants than products here)

@justaskint Жыл бұрын

K value is already given in this question.

@Vedrajrm 3 жыл бұрын

The clicker time pressure is so real

@ardadal6601 3 жыл бұрын

and you feel it, even more, when you watch the video 2x faster

@aditijuneja1848 3 жыл бұрын

at 31:07 x has 2 solutions : 0.381 bar and 0.655 bar, why is 0.655 bar not discussed? partial pressure for N2O would be -0.310 bar (if x=0.655 bar),what does that mean?

@maxramirez8218 3 жыл бұрын

0.655 bar would be unrealistic because you don't have enough initial reactant. As you said, it would become negative measure which is impossible.

@donutzzs 2 жыл бұрын

@@maxramirez8218 actually negative pressure exists, but only in liquids

@tiburon181 2 жыл бұрын

How did you solve for x here?

@qwerty0458 2 жыл бұрын

@@tiburon181 quadratic formula

@dirklutz2818 Жыл бұрын

1-2x >0 so 1>2x and x

@Zenlollipop 3 күн бұрын

I don't suppose many people are still following this course now, but in case anyone is reading this and doing the problem sets on the ocw website: the solutions posted for the problem set for Lecture 18 are either incorrect or misleading. In the decomposition of phosgene question, the question provides an equilibrium constant as K, implying you might have to calculate the partial pressures to solve the problem, but the solution just uses that K value as Kc, the equilibrium constant expressed in terms of molar concentrations. In equations with a change in the total number of moles from products to reactants, these two constants are not equal. So at the very least, keep in mind that the constant provided might be Kc. In the second question on the decomposition of nitrosyl bromide, the same K =/= Kc issue persists. But the new issue is that nitric oxide is specified as being in the solid phase for some reason (I'm not sure this is possible because the boiling point of NOBr is higher than for NO). Presumably it is a typo, but if it is meant to be treated as a solid just as a mathematical exercise, its activity should be 1, not [NO]. The solution provided is correct only if the K provided is used as Kc, and NO is considered to be in the gas phase.

@yurpipipchz75 4 жыл бұрын

3:25 hmm

@anubhavbharadwaj2472 4 жыл бұрын

😂😂 I wish I could travel in past ..reach there and told them about Covid 19. ..It will be a shocker 😂😂😂

@Vedrajrm 3 жыл бұрын

I enjoyed this lecture very much

@Elias.04 Жыл бұрын

14:10 Why would the units always cancel? Since c + d might not = a + b, like in the example at 23:00, wouldn't the units there be bar^-2?

@shauryarai1809 Жыл бұрын

units would cancel inside bracket (Pc/Pref)^a is just some dimensionless quantity raised to some power. dimensional consistency is always there

@chidipaul8845 4 ай бұрын

i love the work u are doing pls do video on chemical equilibrum

@BruinChang 2 жыл бұрын

I think MIT students can do whatever they want to do because they are extremely intelligent.

@garyraab9132 3 жыл бұрын

The class assignment analogy, at the start of the class introduces misconceptions into the concept of chemical equilibrium. Learning is much better, in the longer term, to explain with a scientific model! The real world is complex. We go about trying to understand and explain the real world with models. Totally remove homework assignments and personification, and the real world of chemical equilibrium continues unaffected!

@kallmekrissarchivetiktoks8012 7 жыл бұрын

1.55 was that guy eating in the lecture hall? Is that even allowed during lectures??

@seremetvlad 6 жыл бұрын

Yes. Sometimes students have many lectures back to back and don't have time to eat outside class.

@chumadoshi6987 5 жыл бұрын

I wish I was her student. She is so good at this and so gentle with her explanations.

@chumadoshi6987 5 жыл бұрын

What college is this??

@srishtirathi9015 5 жыл бұрын

@@chumadoshi6987 MIT

@oluwavizzy2674 2 жыл бұрын

what is nit with the food is that what you wanna learn

@ayeshamuneer8028 4 ай бұрын

I have important question to ask if anyone can guide me that :.In Iupac nomenclature "When numbering a cycloalkane with substituents, give the lowest number to the substituent that appears first in alphabetical order.But in some cases,the substituent with lowest alphabetical letter comes at higher locant while the substituent with higher alphabetical letter comes at lowest locant .so kindly explain what is the rule to follow here?