phase transition concept(first order and second order)

[@bidhankhirali]

Gibb's free energy doesn't change discontinuously in both 1st & 2nd order phase transitions. doesn't change discontinuously means changes continuously , what simply means graph is not broken anywhere.these change or doesn't change things are about the graphs of S,V,G with respect to temperature only (under phase change)

[@itsme-xk9th]

Sir, could you please discuss about the two applications of TdS equation. (1) variation of intrinsic energy (2) joule kelvin coefficient... Please sir.

[@palashnandi7787]

Hi Bidhan, your lectures are so beautifully presented that everything looks pretty clear in a very short duration. It's better than many professors delivering lectures in the universities. Sadly I couldn't find any recent video of your's in this channel. You must be busy in your career. But try to come up with new videos at least twice a month. Thanks and regards 😊🙏

[@madhavdua1246]

Thankyou so much Sir 😇🙏 you made the concept crystal clear

[@asf5275]

Very easily and clearly covers a confusing topic....thanks a lot....superb explanation!!

[@sakshishukla5255]

I had learnt it in bsc 3rd year bt now i have forgotten bt your video make me remember... Thnk u sir

[@tusharkumarraj6066]

@Varun Tripathi mere yaha 1st year mai

[@mohdsoheb2434]

Nice video sir. ham logo ki itni madad karne ke liye bahut sukriya sir... thanks sir.

[@bidhankhirali]

thanks soheb babu...

[@suvashshrestha1731]

I read the book BT I didn't understand and I searched and I found your video which made me clear thank you for this video 💞💞 💞

[@shravanaa]

Where the graph is steeper and slope is positive or negative? How to draw the graph exactly after the distinct point of phase transition

[@nivetha01345]

Dont stop ur work. Upload more videos

[@_tasneem7378]

Sir, you said in the second phase transition volume does not change, so why did you graph it like it is changing discontinuously!!!!!!!!!!

[@subhasissarkar1357]

sir it will be helpful if you say something about why gibbs free energy does not change discontinuously.

[@rohitsetty5741]

Subhasis Sarkar Right

[@suvashshrestha1731]

You meant ferromagnetic changes into paramagnetic suddenly at that temperature, is it sudden action ??

[@vickyshankar4864]

In 2nd order phase transition u said that neither heat absorb nor liberates. But when we heat the iron , by obsorbing the heat only it's temp increases...

[@suryalalgiri3452]

What type of phase transition is ferroelectric to paraelectric and vice-versa?

[@malavikas2639]

I think there is an error in drawing the volume- time graph of 1 st order transition please check out

[@suryaarmy1173]

As per the first order phase transition that the Gibbs potential is constant. But you have represented in the graph it is changing with temperature. how??

[@riyashorts9476]

Tnk u sir.. bahut acche se samjaya aapne🙏🏼❤️

[@jeetendhobi356]

sir appne second order ka derivative nahi batahya

[@shilpaverma8732]

Sir you said, both transition occur at constant temp and pressure....but graph are varying with temp....!! What is explanation for it ?

[@pritamkumargiri554]

Graph are varying with time and temperature is constant

[@munishgarg4002]

Bhaiya graph m entropy ki jgah book m G Gibbs free energy de rkha h

[@sucharitapatra8185]

sir u say phase transition happens under constant temp but if temp doesn't change then how will it be transformed from Fero to para.. i can't understand the matter of constant temp

[@bidhankhirali]

Its all about latent heat.. if latent heat is required(to be absorbed or to be liberated)for phase change then its 1st order.. For example- when water is heated it doesnt change to steam as soon as it reaches 100 ° C.it waits there for a time and during this time heat comes(called latent heat) but temperature doesn't increase .& slowly all of water will change to steam .. So even if temp. reached 100°C but u need to wait to see complete phase change..bcoz phase change just is not finished at 100°c but it starts at 100°c..... On the other hand..a whole piece of ferromgnetic iron changes to paramagnetic iron as soon as it reaches temp. Of 1043 k . that means here we have instantaneous phase change & need not to wait at 1043 K for phase change to happen (since latent heat not required)

[@samirmondal7781]

Then what thermodynamics property change discontinuity during 2nd order phase transition?

[@brightsideofmaths]

Thanks for your videos!

[@mishii05tmm]

In 2nd order enthalpy and vilume change continuously

[@poonamnain5251]

Nicely explained

[@mayurakshigoswami8026]

Sir what about 3rd order Transition and lambda phase transition

[@alokparichha5553]

Sir in both cases G changes discontinuously?

[@lavanyakumarv6294]

Gud video ...i liked ur teaching

[@sagarrawal8332]

Somewhere I read that "The first order derivatives of Gibb's free energy change Discontinously in First order phase transition" but you said continously..can you please elaborate.

[@bidhankhirali]

"yes that is it.you can see that entropy and volume are actually first order derivatives of G(gibbs free energy)and u can see that they change discontinuously in S vs T and V vs T graphs..".. but G itself doesnt change discontinuously even if it's first order derivatives do change discontinuously

[@sagarrawal8332]

ohh thank you for reply.....I totally understood now.

[@majedaljaber134]

beautiful work .. thanks a lot

[@vaishali624]

Very nice. Thank you.

[@rainysalman5227]

Nice explanation

[@PoonamSingh-uv4cf]

Nice sir Suggest a good book for us

[@shoaib349]

thank you so much. it helped me🙂

[@meghajoshi6442]

Nicely explained 👌

[@venkatalakshmipeyyala7315]

Thank you Sir, very good explanation. Sir please do some previous problems on this topic.

[@kankaiahk7197]

very fine sir, please upload a video of Crystal structures

[@dkbswisdom9028]

Great, 👏👏👏👏

[@kamleshkumar-io2fb]

Very nice video sir very deeply lern its

[@neelamkashyap5396]

Thanku sir

[@priyamvadavishwakarma7808]

thankyou sir ..it is very useful for me

[@deepachauhan9365]

Thanku sir 😊

[@harmeetsingh175]

V good explanation sir

[@harshrathore5794]

sir plz suggest for csir physical science book

[@bidhankhirali]

+harshvardhan rathore yes ; apka dec wala xam k bad bataunga...

[@harshrathore5794]

bidhan khirali ohk sir....thank u so much

[@Taksheel_ethnic]

please suggest books for Thermodynamics & statistical mechanics..i find it difficult ,,bidhan sir

[@ramsharma843]

sir 2nd order Phase trans maie gibbs energy change krti hai ya nhi?

[@bidhankhirali]

+Aim Nthing nai karti...even first order k comparison m or jada smooth graph hoti hai...

[@ramsharma843]

+bidhan khirali ok sir

[@bidhankhirali]

Aim Nthing yes,,more smooth means here more linear...transition point k is par or uspar ka slope same or almost same hota h jabki G vs T ka graph m (in first order) dono chor ke point ka slope m difference hota h....

[@ramsharma843]

+bidhan khirali ok sir.. gibbs energy or helmoltz energy ko kaise bta skte hai hmm simple words maie

[@ramsharma843]

+bidhan khirali mujhe kisi teacher ne btaya tha helmoltz energy mechaincal work ho tb use krte hai aur gibbs energy jb chemical rection ho tb use krte hai... sir mujhe abhi tk yeh smaj nhi aaya ki agar hmm baat kre free enery... toh sirf free energy ka kya matlab hai ... mujhe ek teacher ne btaya ki aap kisi system pr restriction lga do.. restriction lgane ke baad jo energy exist kregi vhi free energy hai.. sir plz mera doubt clear kriye aap.

[@bookofspirit]

Thankyou

[@saurabhyadav-wh2mp]

Constant temperature nhi constant heat hota hai bhai

[@t2chetansingh280]

thanks very well explained sir

[@bhuvanam6105]

tq so much sir...

[@hemrajpatel1742]

nice concept

[@bsstudy760]

NYC video sir

[@sagarrawal8332]

Thank you for such awesome explanation. Really helped me a lot....One question you said that at constant Temperature but when we heat substance the Temp changes and it doesn't remain constant ? In my understanding we are talking about lattice heat . can you please explain on this?

[@bidhankhirali]

yes,, during phase chage T is constant and heat given to it doesnt change T so called latent heat

[@harshrathore5794]

sir kuchh word hindi me bhi bole......plz

[@abhigond6979]

Aap hindi aur english dono samaya kijiye

[@_tasneem7378]

🔥🔥🔥

[@bouhababrahim2292]

👍👍👍

[@suhahanaurwasi5080]

👌👌

[@Akilam24]

Thank u sir..