Mam u are out of this selfish world!! such a outstanding teaching free of charge ...really u are helping the students who cannot afford Allen coaching!!!
Ms. Seema, ought you not have multiplied the change in enthalpy by the number of moles which is 1 mol? For in the Hess's law we do; nevertheless, cm the change in energy, anyway, is regarding energy not how much per mole. Moreover, in the first part of the problem, you wouldn't have been to subtract P∆V from the change in enthalpy per mole because the units are different.
But mam you said the eqn. ∆H=∆U+∆ngRT to be used only when the reaction takes place in gaseous state,ie,both the reactants and products have to be in gaseous state....
Mam plzzz reply .....u r the only one who can clear my doubt...my doubt is....in 2nd case...change in internal energy should be -41kJper mol.....bcz liquid to ice ....heat is given to surrounding....
Because enthalpy is all about state of a system that is change in heat content that's why we write it delta H (H2 - H1 )whereas q is energy transfer and it depends on enthalpy......
Mam u are out of this selfish world!! such a outstanding teaching free of charge ...really u are helping the students who cannot afford Allen coaching!!!
Best teacher....... U are even better than Allen faculty...🤗☺
Wow you've got a beautiful voice.. Thank you
Ma'am 22:59 delta n = no. of moles of product - no. of moles of reactant, but we have simple taken delta n = number of moles in reactant (1 mol) ....
Finally I got a best teacher I was searching for. Fabulous lecture ma'am
Ma'am please think about teaching Physics also, we need such good teachers for physics also !
Very helpful videos mam 👍👏👏
Ncret based, crisp and on point explanations. Well explained
Osm lecture
excellent teaching , ma'am u got all my doubts cleared. Thanks a lot ma'am
😁😁😁😁😁😁super....!!!!!!!
Please mam you are the only one who explain this
Outstanding lecture love you mam and thank you
Mam your teaching skills is very nice and very helpfull for me
Nice explanation..
Cleared my all concepts
Good explanation
Great lectures! Can u do it the same way with the chapters stoichiometry hydrogen and it's compounds
thak u so such dr
useful videos but u can minimise and avoid too much explanations....
and thank u for ur videos..
Your explanation is too good
Thank you mam
Ms. Seema, ought you not have multiplied the change in enthalpy by the number of moles which is 1 mol? For in the Hess's law we do; nevertheless, cm the change in energy, anyway, is regarding energy not how much per mole. Moreover, in the first part of the problem, you wouldn't have been to subtract P∆V from the change in enthalpy per mole because the units are different.
But mam you said the eqn. ∆H=∆U+∆ngRT to be used only when the reaction takes place in gaseous state,ie,both the reactants and products have to be in gaseous state....
Except of this question all other explanations are amazing 😊😊
U are amazing mam 🥰... your lectures helps us in understanding every topic clearly...thank you so much mam 😊
Thanku so much mam
Mam plzzz reply .....u r the only one who can clear my doubt...my doubt is....in 2nd case...change in internal energy should be -41kJper mol.....bcz liquid to ice ....heat is given to surrounding....
that is correct
@@anant6778 which is correct mine answer or Mam's answer
@@qalb-e-momina7758 Yours
Mam please explain why we need the term enthalpy instead of using Qp?
Because enthalpy is all about state of a system that is change in heat content that's why we write it delta H (H2 - H1 )whereas q is energy transfer and it depends on enthalpy......
Shukriya..
Shukriya means???
Offfoo.. it means thanks
@@chemistryintamil5576 shukriyaa means dhanyy waad. in Urdu
Molar enthalpy of freezing isn't 41KJ/mol...but 6.01KJ/mol...so dU should be 6.01KJ (?)
yes you are right.....41kj/mol is the enthalpy of vaporisation.....but we have to find the enthalpy of fusion so the ans should be 6.04kj
Thanks ma'am
Y there is a negative sign in U=q - pv
It is because U = q + W and W = - PV. So we get U = q - PV.
very very useful videos. and are easy to understand . clean clear perfect videos. but too long and maximized explanation..
How is delta n eqauls to one mole in first part. We are taking the diffrence in which moles are equal. Then delta n will be zero
Ma'am I am in love 😍 🥰 💘 with your way of teaching...
Very good
Yas mam ur... Best... But if u don't get offended... Can u please use.. A little bit... Hindi... It will make ur explanation much more effective.. 😊
I do not understanding English
Mam you are so good and helped me a lot. BUT There's a problem. Can you use a little bit hindi while your videos plzz 🙏
Plz speak in Hindi