Ideal Gas Equation: PV=nRT

[bmcloughlin100]

PV=nRT

[Godbornadam]

I understand this is a low-level education video, but did u really have to write Pv=nrt like a dozen times? lol

[TheLazyInc]

Wait, so the temperatures are all the same for each bubble of particles?

[zeroin1330]

in Hong Kong , we have this in physics module instead of chem

[umarusmanaziz]

i admire your work...you are great and the way you teach is marvellous...i've never came across such a good teacher

[s0m0c]

Gracias.

[artsyspot69]

@789123Y Cause heat causes burns. Which are felt by our nerves, delivering messages to the brain as pain.

[789123Y]

Why does intense heat cause pain?

[eBiology]

@789123Y Because thermoreceptors that are attached to sensory neurons in our skin constantly measure the kinetic energy of the molecules touching the skin, and when this kinetic energy is too high, these receptors will send a message up the neuron to the brain which will be interpreted as pain.

[cheekiangel95]

I wish you were my teacher, I hate mine

[drmo92]

Pressure is equal to force divided by area. How is this force calculated? are we still speaking of m times g? is F=mg just a universal formula for force? but what does the gravitational acceleration have anything to do with the force of the molecules?

[miniradman]

@drmo92 the universal formula for force is kg per m^2. It has nothing to do with gravity.

[anfarahat]

@drmo92 Hi. Actually the gravitational force can be neglected for an ideal gas as the force due to the shock of molecules with the wall of the container is significantly higher than their weight. To calculate the force exercised by one molecule on the wall of the container, you can assume a perfect elastic shock for an ideal gas. If you study this on a microscopic level, you will obtain a formula for the force on the average.

[h2osgafan]

English is not my original language, but I understand this ten times better than when my swedish chemistry teacher explains it. Great work and thanks alot!

[denpanitkov]

i wish my teacher could explatin like that

[denpanitkov]

it's easy now

[amirshahzad941]

jo college me parhaya us ki smjh ni ai but jo ab parhaya us ne meri buhat help ki

[lopgan121]

Thank you 6.02x10^23 times over!

I WOULD DIE IN AP CHEM WITHOUT YOU!

[randomwindowsstuffz]

I know how much a gazillion is! A gazillion = 10^3x where x E Z(set) and x > 1.

[mohossain123]

thanks to you i will probably pass AP chem this year, thank you

[kuncesorzech1991]

pretty good job, it seems to be so easy to understand now. in my schood noone of teachers has tried to explain the subjects that way, too bad. So now i know how we can like to learn in the school. i'm studying right now and in the univesities that things are harder than in school, not because they are more difficult (but they surly are) but lecturers are too lazy to try make these stuff any easier. it's just teaching by heart all the time... sad. Pozdro dla polskich uczelni ;]

[yanarene]

I understood all the stuff in this playlist until you started adding math, lol.

[akhilrey]

thanksssssss a lottt

[akhilrey]

thanksssssss

[MrPMG1994]

n is actually the number of moles, not the number of particles. But, other than that, sweet explanation, got to love this guy!

[UshouldKnowSon]

If my teacher tries to take credit for teaching me chemistry 11, I am going to be showing him your channel. Thank you.

[tika2112]

Very good job loved the video this is now my first good chem teacher and my only one LOL

[Slaceytrainer]

The volume and force of these three individuals are negligible.

[tommypickles7]

@Slaceytrainer hahaha

[oracle233]

3 people are failures



[hanktemplar]

it really makes me angry how incompetant a lot of my teachers have been in explaining various chemistry concepts and here you are, this guy who's basically teaching for free, and you explain things so succinctly, well i congratulate and thank you, sir. you have done more than any of my chemistry teachers have ever done

[DehXable]

"it will start to matter" Khan makes puns without even trying.

[michael0001able]

school is for losers

[Sniperalexxx]

You are a great teacher.

[MrJamseyt]

n= number of mols, not number of particles. Am I right? Good video!

[540faria]

LoL I was completely puzzled with my fuckin books !  now..im YO :) MY PROUD TEACHER SHOULD WATCH IT !

[smithjohn2100]

maan u explain bttr dan any teacher in my institute...

thanx man

[estevedidac]

thanks for letting me understhanding the ideal gas

hope the best 4 u

[khalid01234]

simple and clear

thanks (:

[paulceltics]

bounce bam bounce bam LOL

[vicongos]

LOL NOT RESSURE HAHAHAH

[MrAlb0t]

seriously... i don't even know why i bother staying in front of my useless thermodynamics book while i can just watch this videos.

Thanks alot man!

[Byron10301]

Very good video, once again. Still, I'm still not clear on why it was necessary to introduce the constant "R". I know without R our units won't work out but, where does the R come from? what does its value depend on?

[review424]

If you need to know deviations from ideal gas law, Khan does yet have a video on it. Until he makes one, I thought I'd submit my own. Just add youtube.com

/watch?v=UH-PSd1V95M

Let's continue to expand Khan's database! (If you want this video gone, just say so).

[xastrickxplusx]

ideal gas law = ur best friend in chemistry :O

god i had to do like 5 problems that went from thermodynamics to ideal gas >__<"

[ForensicChemistry]

Sal, i am very very very ecstatic that you made these videos because my chemistry teacher doesn't explain anything well and its like he just stands up there and does the problems to himself. i appreciate all these videos you made and now because of them im going to AP chemistry

[Trinitrotoluene101]

TYSM! you saved me on a formal lab write-up. Plus your very descriptive, but descriptive with a sense of humor. thnx again. Thumbs up.

[findtheshinningstar]

NICE VIDEO! Thanks, very enjoyable

[LivinCurse]

Hey sal!

Great Videos but I have a request. Can you please stop moving the cursor when you are thinking because it gets really distracting.

[TheModificatioNation]

@LivinCurse reading this comment just made me focus on it and make it distract me, thanks lol

[jaipalveer]

your soo sooo much better than my both of physics and chem sir's,,,u rock !!!!

[jonzeey93]

1 person didn't understand this video

[RC97062]

i just thumbs downed it cuz i could

[MyRealNameIs28]

@RC97062 But you could also thumb up so there must have been another reason for thumbing this great video down!

[teddybear35]

Honestly ur videos r the best on utube

thank u for sharing

[Necrome86]

BÄM!

[Unknown1101]

Sal you are the greatest man alive!

[MikeSw3nz]

152 likes 0 dislikes...pwned

[LOLURCATS]

lol PV=nRT is such an easy concept

R=0.08206 for atm or 62.37 for torr

V=liters

T=Kelvins, (add 273.15 to Celsius to get Kelvin)

Or Partial Pressure

Pi=niRT/V

Pi=(Xi)(P)

Where Xi=Mole Fraction=Ni/Ntotal=Moles of one substance/Total Moles.

This ideal gas law breaks down under conditions of high pressures or low temperature. In which case we use the Van der Waals equation, where the a value account for the attraction force and the (V-nb) value accounts for the fact the that actually have volume.

[143tommygirl]

Very interesting! You made the ideal explanation of what ideal gas law is.

[trishasinger]

i think i love you

[ChaosInsanist]

How exactly does one deduce the actual identity of gases produced during a reaction? :o

[onefortheshadow]

yea i d like to say your videos have really helped me alot. i first seen your stuff with algebra, i ve had the misfortune of some bad professors and to have your vides are so helpful....thanks dude

[gfivefour]

Thank you!!!

[Opo227]

My chemistry teacher plays these in class because you teach it better than him =).

[kibaXxXhinata]

holy crap this was incredibly helpful.

[JBBodo]

all these years memorizing concepts to forget them after exams, now that i undrestand them it is totally #t

[Joeyg143]

LET's Say we have a ballooooon.

[GeekBoy03]

So lets say I have a temp and area, but do not know how much hydrogen is flowing through this area, but need to find the rate of flow/velocity?

[GeekBoy03]

So what do you do if you only have the gas type (thus have the mass of atoms), temprature, and area? However, need to find the pressure, rate of flow of the gas, and moles in the area?

[Reader9797]

This is a great explanation.

The teachers at my school could only dream of teaching as well as you can

[minnocent2008]

@Reader9797 lol

[garf222]

great Explanation & I love how you present this. This is so much better than videoing a presentation on a whiteboard. Could you tell us what software you are using? Is this off a graphics tablet?

[whats12345aa]

g8 i <3 ur vidz

[SteroidsR4success]

This was great. A lot better than those gay ass stoichiometry videos.

[V19torrent]

so all the gas particles are male?

lol

Thanks though! This helped.

[MrShakespere]

this is gd...the laws of gas do also fall under physics as well ppl :D

[patilnikh]

Science is basically derivations!

Thermodynamics, Carnot Cycles, Partial Pressure, Structure of atom all fall under BOTH Physics and Chemistry

[MrShakespere]

ok :)

[VccV66]

sPread.. not sread... d'oh.

[VccV66]

Thankyou ... i've sread the word too!

:o)

[Subaangen]

gezillion ....LOL!:D

[theartyard]

I want to just say thank you so much and I appreciate you spending so much time and effort to make all of these videos for us to watch. Your chemistry videos have been so helpful to me, I'm going to watch all of them. I find them good preparation for my upcoming Chemistry uni interviews. I've told my friends about khanacademy. Spread the word everybody! :)

[Dustin8872]

This is a great video. Subscribed :). This stuff you're posting helps me a bunch in my chemistry class :).

[BNKGLiiTCHtoCARBINEz]

omg. you are an amazing teacher. thanks so much 4 vid. helped me lot. fingers crossed for exam tomorrow lol

[Avikal2]

you clear our life's biggest confusions in just 10 mins.

thank you very much!!

[rubencastella]

R=R = 8.314 is for when we are talking with P = P V = m ^ 3 and R = 0.082 is for when we are talking about P = atm and V = dm ^ 3 or L

[StagedLenny1]

omg xD lolz say what :! :?

[emad309]

u are amazing , but i have always wondered where the constants in physics and chemistry come from .

[TylerDurden1027]

Lots of magic.

Experimentation

[63266]

my friend...you are an amazing teacher....thanx for your beautiful lesson

[xxxcoolboyxxx]

thx salman bhai

[ninamikou]

i luvvvvv this video!!!thx dude!

[zguitarmaster]

One important thing here is that all gases can approach ideal behavior at a high temperature and low pressure.

At high temperatures, the gases have so much kinetic energy that they won't interact with each other,k and we can ignore attractive and repulsive forces.

At a low pressure, less force/area is exerted on the molecules, so they can spread farther apart.

This conditions cannot be achieved, only approached as pressure goes to zero and temperature to infinity by all gases.

[Jinsey]

But I have a question. If the pressure is low, it would mean that the particles'd be in a slow speed, how do they be further apart? Then how come they have much kinetic energy with the condition of high temperature?

[hexedbrood]

hi, great video i must say i never knew how to derive that equation :S but according to my notes if you plot a graph of PV/RT against P you'll get a straight horizontal line for ideal gas but for non-ideal gases it's in the shape of a J as pressure increases. why does the curve decreases then increases again?

[zguitarmaster]

If I'm not mistaken when you talk about a graph between PV/RT vs. P, the V in PV/RT actually includes the moles, so the V is actually molar volume. Molar volume is defined by Wikipedia as the volume occupied by one mole of a substance.

So the ideal gas is a horizontal line because Z=1 as should for an ideal gas its unchanging as the pressure changes. For a real gas, Z decreases first because at intermediate pressures attractive forces dominate, at higher pressures the repulsive forces dominate.

[jacoman1234567]

R is the gas-constant. It's in the equation to balance the units used. R is found by multiplying Avogadro's number with the Boltzmann constant

[nafizkarim]

niiice... I don't get R?

[Woka53]

R=8,314 or R=0,0082.

[sultanthewise]

awesome!