Heat of Combustion 🔥 || Super-Concepts and Amazing Problems || IITian Explains

Hello Guys,
In this Lecture We are going to understand Heat of combustion (HOC) in details.
Heat of combustion - Heat released during combustion . In particular, it is the amount of heat released when a given amount (usually 1 mole ) of a combustible pure substance is burned to form incombustible products (e.g., water and carbon dioxide); this amount of heat is a characteristic of the substance. Heats of combustion are used as a basis for comparing the heating value of fuels, since the fuel that produces the greater amount of heat for a given cost is the more economic. Heats of combustion are also used in comparing the stabilities of chemical compounds. For example, if equal quantities of two isomeric hydrocarbons burn to produce equal amounts of carbon dioxide and water, the one releasing more energy (i.e., with the higher heat of combustion) is the less stable, since it was the more energetic in its compounded form.
Thanks
MKA Sir

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Sir please a video on heat of hydrogenation also pls !.and this one is awesome concept building video .and 5 min silence for those who disliked the video

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Fadu lecture saare doubts ko faad kr rkh diya aapne thanks sir.........

[@vivekverma4050]

At 24:05 Order should be 2,1,3,4 As for C(8-11) cis>trans (stability). sir correct me if I am wrong

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Sir a humble request... Sir you have a awesome content but some of the videos i miss sometime because they are not in any playlist....so sir pls add them in respectice playlist or make a new playlist fir them...tysm sir And i haven't watched this video yet but,not braghing or flattering, i can tell that this must be a super dooperr video .tysm sir💯🕺🔥🙌🎉🤩🥇🤘👍💫

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Sir subh subh aapki video ka he intzara rhta h .....tysm sir ..

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All concepts Cleared...

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Badshah of chemistry

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Once again 😊 he proved why he is called the best teacher of organic in India🙏🙏

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बहुत ही ज्यादा अच्छा समझाया sir aapne thanku very much for online support students 🙏🙏

[@pranav6352]

Do all the weird topics need to come in exam before i watch your video ? I was in 8th jan shift and got question on HOC,quasi aromatic and oxidation of compounnds where cyclisation was to occur.

[@matthewjk4781]

Sir Thank you for your wonderful classes, i was wondering if the solution to your fourth question 24:13 had a slight mistake, I came across a book which explained that in a ringed system containing less than 11 carbons the cis-isomer was actually more stable than the trans-isomer, but the solution considers the trans-isomer to be more stable. I'am quite confused as to what the actual solution would be. Thank you sir for all your hard work for us students

[@ishaanjain4973]

What a video sir......You deserve a lot more Sir..Even the best teachers in our coaching did not cover this concept so well. I was badly confused in per CH2 group concept . You show that IITIANS ARE DIFFERENT.

[@ms7820]

Sir hum IIT JAM Chemistry keliye bahut ache se prepare kar rhe he.......But hume sirph itna bataiye ki placements kaise hote he msc ke baat.....what is the minimum PACKAGE after passing from NIT(not IITS) without gate or net?......what is the placements percentage from NITs? Plz sir reply us...

[@pruthviraj9602]

Amazing lecture!!😀 I also need a video on heat of hydrogenation

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Thank you so so sooooo much guruji

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Welcome. 😃

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Seriously u r best

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Super concept

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plz bhaiya HOH (heat of hydrogenration) samjha do bohot problem aa rhi hai.. plz make a video on it.. love to see your knowledgable and concepts gets crystal clear..

[@johnyjangid8541]

Jyada Fikr mat karo "HOH is directly proportional to No. Of Carbons".

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As usual vidoe gave us lots of knowledge!!!!!....

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Always confused whether ur last video was best Or the current one, and same happens again, just 😍😍😍. Thnks sir. Sir physical chemistry v, ek video ek chapter ek question in iit, aisi series bnaa leejiye, vaise current one is just amazing 😍😍

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Sir next -- Biomolecules from scratch to Advanced level....pls sirji

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We have noted your request.

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Sir plz ionic equilibrium

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Thik h.

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@@IITianexplains please sir ionic equilibrium

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best video sir make video heat of hydrogenation

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Tu yahan pe

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Yeah Ashish bhai

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I am very busy dear. Bahut bole toh bohut busy. 18 to 20 hours a day. Time nhi mil pa rha. Sorry. 🙏

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Sir ji pls aap field effect explain kar denge...request from an ardent follower...love you guru ji.

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Very helpful to me sir, thnaks a lot you are really God of organic chemistry.

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24:18 Q4. In 10 member Carbon ring cis is more stable thn trans and there is Trans, Trans and cis in option 4 not trans trans trans.

[@adityabhagwat9074]

That's right!

[@adityabhagwat9074]

I am not getting how he solved like that.. in cyclic compound, if the ring size is less than 11, then the order of stability is opposite, i.e cis is more stable than trans

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Sir thoda time leke coordination compounds complete kariye. Wo aap ne unacademy special class me bhi nahi karwaya

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Sir last question no.6 mein carbon count nahi karne hain

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Sir, u r making OC lit 🔥🔥

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Please sir physical chemistry k concept batao

[@digantakarmakar1640]

Sir question No.6 is wrong becouse the carbon attached to the ring has 6 bonds. Which is not possible

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SIR CENGAGE ME GOC ME EXERCISE ME JO Q-62 WEDGE DASH WALA HOC KA QUESTION HA USE KAISE KARENGE .

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Sir u missed a part of cyclopropane in Question 2 part 5

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Ty sir 👍

[@adityabhagwat9074]

Sir if we see according to bond order, then alkyne bond order >alkene>alkane, and we know that stability is directly proportional to bond order, therefore alkyne is most stable hence least heat of combustion, can we explain in this way too? Or is it just a co incidence?

[@pranjalck]

Sir 25:10 me aapne bola ki jada product ban rahe he to jada stability hogi or jitti jada stability utna HOC kam as in 10:51 ... Fr sir apne order 1>2>3 . Us hisab se to order 3>2>1 hoga na sir l... Btaiye sir Plzzz..

[@IITianexplains]

Look carefully. At 25:10, we are talking about stability of product formed and at 10:51, we are talking about substrate stability. Dhyaan se lecture suno and dekho, kbhi doubt nhi aayega. 💥

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The one person who disliked the video was from heat of hydrogenation department

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Make a video on boiling point and melting point in organic chemistry sir

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Noted your request.

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Also sir video on heat of hydrogenation Whoever wants like ❤👍 👍👍👍👍👍👍👍 👇

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Sir so grateful for your efforts. I just want to request to please make more videos on relatively hot topics like aldol cannizaro coupling etc

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mazaa aagaya😀

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Best lecture by far on KZbin

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Sir please make a video on Nitrene

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Noted your request.

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thank you sir for helping me to clear my concept.

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thanks guruji

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Guruji me unacademy Plus me hu aapke video me maja aaya

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Thank you very much Sir 😊😊 ab HOH ka sawal aayega to macha dunga😍😍😊

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Best lecture sir 👌 very nice concept

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Best style of teaching

[@suvendu286]

In case of 10 membered ring, cis is more stable than trans. So its HOC should be less.

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Sir plies make video on tollens and Fa reagents pliessssssssss

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❤

[@IITianexplains]

🙏💥

[@ar3568row]

if structure is more compact , wouldn't it mean that steric repulsion is more , why more stable than ?

[@IITianexplains]

Is replulsion only a force working there ? There are so many compact models theory about this. von Rogue Schleyer, University of Georgia, Athens, GA, USA have built on their earlier model on compact structures. According to this model, branching means that the electronic structure is simply more compact and this decreases molecular surface area per atom and so leads to a lowering of energy and increases in stability.

[@ar3568row]

​@@IITianexplains actually sir , i didn't understand why low surface energy would mean low energy , I am in class 12th currently , and i don't know relation between surface area and energy of atom , I can see little resemblance with concept of surface tension where low surface energy means low energy , but why is it so in case of atoms ?? I am sorry if I am asking something very silly. ^_^

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Sir 2 enantiomers me kaise compare karenge

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Suagat hai sir with physical chemistry topic.

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Hai goc se hai baisa

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Satisfied sir ty Interesting and simplified

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Sir app roj kitne baje uthte hi

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Mushkil Sawaal. 🤣

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@@IITianexplains sir pata hi mere chemistry me sirf 25/100 aye😔😔mera aim tha apke jaisa banana😆😆😆😆

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Sir in Q4 why is two trans-trans more stable than one trans?

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Thanks sir

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SIR JEE MAINS 2020 KA HOC WALA SAWAL KARA DIJIYE

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Wo sub ne already krwaya hi h..mja nhi aayega. 😊

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@@IITianexplains 🙏🙏🙏👍great

[@hiransmelodyunique1466]

Sir you told in earlier that HOC is directly proportional to the no. Of carbon but in the last session in this video in question no. 2 .. how 8c membered ring is existing with higher heat of combustion.. please break my doubt sir

[@deepabisht8257]

Itna chutia doubt kon puch skta h

[@shivamgupta1535]

25.42 sir cyclopropane ko kaha put karke ?

[@rmgx2031]

Sir which chapter is this sub topic from and can u tell the importance of this for neet

[@piyushbaldwa6485]

Goc

[@IITianexplains]

@@piyushbaldwa6485 Yes this is from GOC. Very important for NEET as well.

[@pranav6352]

Sir i have a doubt you said stability is proportional to branching it means that more branched is a compound, more stable it is. Then why melting or boiling point of a straight chain is more than that of a branched chain we are told if has more surface area and hence it is stable Plz sir reply

[@DeepakKumar-xj4ul]

sir agar ethane jyada bond banayegaa to wo jyadaa stable hogaa .too sir aapne to kaha ki hoc inversely proportional hota hai stability ka too sir aap ethane ka hoc jyada kyu kiyeeee please reply.

[@mr.lonely1213]

Sir wht happened ?

[@lakshay6145]

Sir please teach biomolecules and polymers..

[@pushpendubaidya_honest_talk]

The legendary

[@studentjee6672]

Sir coordination chemistry complete kar dijiye pls

[@fab8187]

Iove you guruji

[@abhiiitb5051]

Sir 23:58 pr Qno.4 me last waale compound me 2 hi trans h and 1 cis h and also complete conjugation bhi nhi h, so how can we compare 3 and 4 bcoz both hv 2 trans?? Sir plz bta dijiye..

[@driptahaldar2299]

অসাধারণ সুন্দর স্যার ❤️

[@heramb575]

Sir can u make a video on heat of hydrogenation also?

[@dragonking7300]

Sir at 23:35 how to decide whether hydrogen is in cis configuration or trans configuration....

[@IITianexplains]

Look at methyl groups with respect to double bond. Cis for same side and trans for opposite side.

[@dragonking7300]

@@IITianexplains OK Sir. Doubt Cleared... Thank You.. 😊