Is it a Spontaneous Reaction? Delta G tells you!

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Is it a Spontaneous Reaction? Delta G tells you!

Рет қаралды 245,199

11 жыл бұрын

To determine if a reaction is spontaneous, use this formula to find Delta G. Gibbs Free Energy is NEGATIVE for spontaneous reactions.
You can also determine above which TEMPERATURE the reaction will be spontaneous. Check it out!
Check me out: www.chemistnate...

Пікірлер: 92

@heatherleisure9217 8 жыл бұрын

Oh the magical simplicity of this. My textbook insists on cluttering this up with all kinds of colorful and unnecessary visual pollution.

@josephbyron7004 2 жыл бұрын

well said

@brianmichalak7451 9 жыл бұрын

"... Well hold on - we have a formula for that!" This guy is awesome

@sxyval4u 8 жыл бұрын

you taught me more in 5 minutes than my actually class I sat in for 4 hours. you rock thanks dude.

@owenduck 8 жыл бұрын

This guy sets the bare for hand gesture enthusiasm.

@SageAndTwine 8 жыл бұрын

+Curious .Kid bar

@insertnamhere568 8 жыл бұрын

+Manaless bear

@owenduck 8 жыл бұрын

Manaless you would think being nearly 30 I would be able to spell 'bar' by now aye. You'd be wrong!

@georginaburrows 8 жыл бұрын

thanks dude! you taught me more than my chem 116 professor ever did lol

@vadel7916 6 жыл бұрын

Thanks for the quick, helpful video. This clarified my chemistry teacher's entire lecture in less than 5 mins.

@happybyte7781 6 жыл бұрын

SIR PLEASE INCLUDE ALL VIDEOS OF ELECTROCHEMISTRY IN YOUR SEPERATE PLAYLIST ALL THE WAY IT`S BEEN VERY HELPFUL FOR ME KEEP UPLOADING SUCH VIDEOS THANK YOU SIR FOR YOUR EFFORT AND TIME

@superspideee 11 жыл бұрын

That was the MOST concise video ever thank you so much :)

@GonzaloBelascuen 10 жыл бұрын

what you said on 4:00 is wrong, if delta H is positive and delta S is negative, there is no temperature that will make that spontaneous

@Chibuike16 10 жыл бұрын

thank you. you are right :) i was getting confused

@Dsmlee105 8 жыл бұрын

Not true. Just do the math. If the T is high enough, then S and T together will be a bigger value than H, making its value negative

@Danny-ip5dy 7 жыл бұрын

+Lawc The equation is -TDS so even if temperature is big it will only get more postive

@thajasnethomas778 5 жыл бұрын

you are right... that is correct.

@Agardave 7 жыл бұрын

Honestly, one of the best chennels to reffer to when cramming for the AP Chem exam. Got less than a week left. Let's see how I do XD

@happybyte7781 6 жыл бұрын

VERY WELL EXPLAINED SIR GOOD JOB!!!

@buthainarahim2910 2 жыл бұрын

The thermodynamic parameters of lactose decomposition (without enzyme) at room temperature are as follows: AS = 30.7J/mol K AH = 0.44 kJ/mol Calculate AG. Is the reaction spontaneous? Discuss the answer. Would the free energy of the reaction change if lactase catalyzed the reaction?Hello Doctor, can I get the answer to this question?

@PeaceOtoide 6 ай бұрын

AG= - 8713.21j Is it correct??

@johnpocket7920 8 жыл бұрын

thx this was helpful ima still fail the my chem quiz but at least i wont fail to hard

@tobiasjohnson 7 жыл бұрын

He said you can drive any reaction to spontaneity if you push temperature high enough, but I thought that exothermic reactions occur less when temperature is higher because of Le Chatelier's Principle...

@warrenfranklin6173 7 жыл бұрын

"....Or does it need a little prodding?!?! " ...lol love it :) Great video

@alienspecies6872 Жыл бұрын

This was a good video from study point of view and entertaintment point of view.

@dawzrd2458 6 жыл бұрын

What if we are only given a chemical equation and we are asked whether delta G is >=< 0?

@jorgepadua5802 8 жыл бұрын

SHouldn't the symbol be greater than or equal to? That would include 384. The way you have it written down is 385 or higher.

@tylerjanssen7535 8 жыл бұрын

+Jorge Padua No, if it is at 384, Delta G will be perfectly equal to 0 which is equilibrium and not spontaneous.

@buthainarahim2910 2 жыл бұрын

Hello Doctor, can I get the answer to this question?

@Ins_Pri_Media 6 жыл бұрын

This is very helpful, thank you!

@kaitlyn234 2 жыл бұрын

Great simple video, thanks for this!

@baraskparas9559 2 жыл бұрын

Great explanation and example. Thanks.

@hardiksinghparihar3482 2 жыл бұрын

Great . I understand properly

@anya8207 4 жыл бұрын

well isn't T going to be less than those numbers？

@perrinpartee557 6 жыл бұрын

what if they only give you the reaction and temperature?

@harshitnirwan6237 4 жыл бұрын

Great explanation sir thank uh. Very much

@mikeynkoey 8 жыл бұрын

I believe this is incorrect because when you do the last division the "alligator" should switch directions....

@michaelsisson5147 8 жыл бұрын

He never multiplyed or divided by a negative, no need to switch the direction.

@mxhotty1012 10 жыл бұрын

Thank you!

@xiuxiu1108 4 жыл бұрын

Both DeltaH and DeltaS are functions of temperature, how do I find T if all I have are the nought values (T=25C) for deltaH and deltaS from a table?

@chemistNATE 4 жыл бұрын

You're PROBABLY supposed to assume that DeltaH and DeltaS don't change *much* with temperature. Use the value of DeltaH and DeltaS from the table, and set DeltaG=0, then solve for T to find the temperature at which it becomes sponstaneous.

@itsalluptome6282 4 жыл бұрын

Thank u...always wondered how to solve this ques😅. Probably it is easy..thnx again

@tony484x 11 жыл бұрын

this video was on point. thanks man.

@rusc9275 3 жыл бұрын

You explained it so well, Thank you huhuhuh.

@jatinbhai6542 3 жыл бұрын

From India

@adarshk00152 3 жыл бұрын

Me too

@malachigrant4310 5 жыл бұрын

Thanks

@mariasegura8349 Жыл бұрын

THANK YOU🙏🙏🙏

@jessicazwilling7456 6 жыл бұрын

Stay G! hahaha! You're the best, Nate.

@TravelWithTea8 8 жыл бұрын

How can I predict if this reaction is spontanous with this formula? deltaG = deltaGo + R * T * ln Q (if Delta G ^0 is positive)

@rpgdream9700 6 жыл бұрын

this didnt really help me as I'm not studying chemistry, but metabolism, however credit were its due, u r clearly an excellent teacher

@AdityaPratapSingh-ss8wg 8 жыл бұрын

I am from India and this really helped me to solve chemistry question .....😎

@frankieroandMCR 10 жыл бұрын

I was struggling with rearranging to find T (dumb I know) so thank you!

@webuser5950 7 жыл бұрын

From kilojoules to joules you multiplied but aren't you supposed to divide?

@vibesonly2024 7 жыл бұрын

Dakota McIntire I just did this... I feel it's wrong. at the end delta g was 176. the sign had to be less than

@joshua7015 6 жыл бұрын

No. 1 kJ = 1000 J Therefore to get from kJ to J you must multiply by 1000

@TheStarclips 11 жыл бұрын

I got delta G to 176 J. And that means it isn't spontaneous. Right?

@munilalofficial5224 3 жыл бұрын

What's the use of making video with a calculator

@khalfehoopstar 11 жыл бұрын

yes

@GentlemenCommander 5 жыл бұрын

Thank u my gpa will not go down this semester :)

@tahsyns.1506 4 жыл бұрын

God bless you 🙏

@snuggisthecute 7 жыл бұрын

THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!

@yonasy8136 7 жыл бұрын

I really need help in chemistry

@melissaismel 11 жыл бұрын

thanks!

@blackrmgaming6758 3 жыл бұрын

Nice ty sir 👍

@codymiller3877 10 жыл бұрын

I understand the math for these problems, but I don't get the difference between spontaneous reaction and non spontaneous reactions. Why does a negative g value mean that it is spontaneous?

@soumyajitchandra3914 9 жыл бұрын

dStotal = dSsystem + dSsurroundings = dSsys + dqsurr/Tsurr (-dq of system = dq of surr) =dSsys + (-dH)/Tsurr ( dq = dH under isobaric conditions) Or, TdStotal = TdSsys - dH = -dG Or, -TdStotal = dG For spontaneous process, dStotal = +ve So, dG = -ve The reverse follows for spontaneous process. A rough idea.... Note: The d's stand for delta and H for enthalpy...G for gibb's energy and T for temperature

@soumyajitchandra3914 9 жыл бұрын

soumyajit chandra Sorry.. "reverse follows for NON- spontaneous process" :) oops!!

@Tala-qj6tz 8 жыл бұрын

+soumyajit chandra Hi!!! thank you for this explanation! I was just wondering why you considered Tsystem=T=Tsurr? is it an assumption you made or is it that T in your calculation stands for the temperature of the surroundings?

@simeonkwanta5824 8 жыл бұрын

very Good.

@PolloJack 9 жыл бұрын

Freaking out on a practice exam so I check your video. The answer for the practice is wrong lol.

@intisarali4212 7 жыл бұрын

Thank you you helped me alot

@johnyboy49 10 жыл бұрын

yeah yo stay g, spontaneous reactions r so hood

@RommyRenteros 11 жыл бұрын

perfect!, thanks!

@kipling1957 5 жыл бұрын

Okay. So, therefore, to a bigger and (to me) more interesting question: Isn't the simplest way to convey the idea of how complex living systems evolved, making order out of chaos, that of an energy trap? The heat energy of the sun being a garden hose spraying a rockery that catches water at different levels of potential energy above the ground can be analogised as exciting molecules that are "caught" at stable higher energy configurations (the negative delta G of chemistry). Then it's down to probability, evolutionary theory and an enormous time scale to get to chlorophyll, glucose, etc, etc... Temporary pockets of negative entropy if you will.

@phemelomoila7283 5 жыл бұрын

thanks Mr I learned sumthing

@alok_joshi_here 3 жыл бұрын

Thanks bro I am from india

@kevefe7335 4 жыл бұрын

Less than sign is the other wasく

@maxifitness7526 11 жыл бұрын

I bet those are the most famous hands on you tube!

@suyvairu 8 жыл бұрын

Whatt about for nonsponaneous reactions?

@vika0194 8 жыл бұрын

+Sarahit Aviles same procedure. if delta G i above 0 it is non spontaneous

@rajukajadu1253 7 жыл бұрын

HOW TO FIND DELTA S AND DELTA T

@bscc181 4 жыл бұрын

delta g is negative for spontaneous reaction

@dr3.02 2 жыл бұрын

interesting how this can be explained in 4 minutes and not a 1 hour lecture ugh

@fopefoluwaatanda1433 2 жыл бұрын

Negative G spontaneous

@charliehobin7794 5 жыл бұрын

"Stay G" Now that's epic

@maxifitness7526 11 жыл бұрын

Hey move tht calculator can't u see i'm writing notes!

@TheSonikspeed 8 жыл бұрын

Hey bud, this is actually incorrect. A spontaneous reaction must have an enthalpy

@MonkeyDLuffy-xr4fl 8 жыл бұрын

+TheSonikspeed A spontaneous reaction can occur regardless of its enthalpy and entropy. The only condition for spontaneity is a negative Gibbs Free Energy.