Sorry but you wanted to make a equation without those contants like a , b , etc . But this equation ( i.e. reduced variable one ) contains terms like Pr , Tr and Vr which is directly related to vander waal contants 'a' and 'b' . I don't understand that how this equation says that all gas behaves same at same conditions
The key is that "the same conditions" here means the same conditions *relative to the critical point*. It is not true that all gases have the same pressure at a particular T and V. But the vdW equation does predict that the *reduced* pressure of any gas is the same at the same *reduced* T and *reduced* V. In other words, if you happen to know that CO₂ has a pressure that 17% above its critical pressure when it is at 1.5⨉ its critical temperature and triple its critical volume. Then it is also (at least approximately) true that N₂ will have a pressure that 17% above its own critical pressure when it is at 1.5⨉ its critical temperature and triple its critical volume.
I really appreciate this video there're not many helpful content on this you're the physicochemistry op 🙏🙏🙏 thank you
I'm honored you think so, and glad I could provide the info you wanted
Thank you doctor. You've made me understand this concept. May God bless you 🙏. Am a student here in Makerere University in Uganda in East Africa
You're welcome! I love to hear from students around the world that have found these videos, so thanks for the comment!
Sorry but you wanted to make a equation without those contants like a , b , etc .
But this equation ( i.e. reduced variable one ) contains terms like Pr , Tr and Vr which is directly related to vander waal contants 'a' and 'b' . I don't understand that how this equation says that all gas behaves same at same conditions
The key is that "the same conditions" here means the same conditions *relative to the critical point*.
It is not true that all gases have the same pressure at a particular T and V.
But the vdW equation does predict that the *reduced* pressure of any gas is the same at the same *reduced* T and *reduced* V.
In other words, if you happen to know that CO₂ has a pressure that 17% above its critical pressure when it is at 1.5⨉ its critical temperature and triple its critical volume. Then it is also (at least approximately) true that N₂ will have a pressure that 17% above its own critical pressure when it is at 1.5⨉ its critical temperature and triple its critical volume.
A man of your talent should be teaching at a university
Iam sad that you are very underrated
Lol, that is exactly what I do! These videos were made for my university students. Thank you for your kind words.
Thank you so much for sharing the amazing and conceptual lecture..
My pleasure. Thanks for taking the time to comment
Thank you very much for the video! Excellent explanation.
Greetings from Brazil!
Obrigado, glad you liked it.
Thank you for this. I understand it now.
Great, I'm glad to hear it
superb work.
Thank you sir
Thanks alot..
You're very welcome!