Cyclic Rule

The cyclic rule, or triple-product rule, relates a partial derivative to the other partial derivatives that can be obtained by rotating through the variables involved.

[@matthissa]

Very nice explanation, thank you very much. Sad that not many students discovered the channel.

[@PhysicalChemistry]

Thanks. No need to be sad -- my own students have discovered it.

[@로롤해]

I finally found cyclic rule explanation... very nice and kind explan... I can't speak eng well but i want to say thank you this video saved my life. -from Korean student

[@PhysicalChemistry]

You're very welcome

[@charlesochiengtala324]

Wonderful. Audible, systematic and irresistible thought process that boost memory work and replication. Am making it a habit to consult your channel. Thanks a lot.

[@PhysicalChemistry]

My pleasure. I'm glad it resonates with you

[@rochemist5975]

This is an excellent channel for learning physical chemistry. I wonder why KZbin don't recommend this channel to everyone..!

[@emmanuelt928]

THANK YOU. made so much sense of it]

[@PhysicalChemistry]

It's much easier when it makes sense, right?

[@sundaymacdonald2882]

I am an undergraduate studying engineering and I find this beautiful and useful.

[@pengu9099]

Thank you helped a lot..

[@PhysicalChemistry]

You're very welcome

[@jossaneleazareden375]

Cool

[@PhysicalChemistry]

I agree -- this is a great equation. It's pretty, and also very useful

[@vechalapulokesh2159]

very nice explanation

[@PhysicalChemistry]

thanks

[@melodylawrence3458]

I have a question. Is cyclic rule applicable for any and all functions? Or is it applicable only for exact differential functions, or state functions, and so on. I'm asking if there's any constraint at all on the type of function this rule can be applicable to. Because i saw u use reciprocal rule on this formula's derivation, which is only applicable for state functions (exact differentials) Please help

[@PhysicalChemistry]

That's a great question. Your intuition is right: you can't use the cyclic rule for inexact differentials.

[@melodylawrence3458]

@@PhysicalChemistry wow thanks for confirming that. i didnt expect a reply on an year old video haha, glad u replied :)

[@bekzodsadullayev5184]

Hello! Thank you very much! How do you write inversely?

[@PhysicalChemistry]

I don't write backwards at all -- I make the computer do that difficult work instead. Here is an explainer: kzbin.info/www/bejne/j57Ze4mhrq-VgsU

[@bekzodsadullayev5184]

@@PhysicalChemistry thank you sir! Really appreciate it)

[@manojsharma-ei7bu]

very nice explanation.........really worthy.......

[@PhysicalChemistry]

Thanks, I appreciate that

[@abamitbhatti]

Very useful

[@PhysicalChemistry]

I'm glad to hear that, thanks

[@alaa2581]

👏👏👏👏👏👏❤️❤️❤️❤️❤️❤️ Thank you so much

[@PhysicalChemistry]

You're welcome