Rydberg Constant

Moderators: Chem_Mod, Chem_Admin

Anthony_3C
Posts: 29
Joined: Wed Sep 30, 2020 10:00 pm

Rydberg Constant

Postby Anthony_3C » Fri Oct 23, 2020 3:33 am

In the Equation that Schrodinger found: , the Rydberg constant according to the text book is 3.29 X 10^15 Hz. However, in the hint section for a question on Sapling, it says R = 10 973 731.6 . Which one should I use??

George Cazares 1E
Posts: 36
Joined: Wed Sep 30, 2020 9:39 pm
Been upvoted: 1 time

Re: Rydberg Constant

Postby George Cazares 1E » Fri Oct 23, 2020 8:24 am

I believe 3.28984x10^15 Hz is more commonly used in this course, and Lavelle has 3.28984x10^15 Hz as the value of the Rydberg constant on the constants and equations sheet. But, I'm not sure if R = 10 973 731.6 m-1 could be used as well to solve the question on Sapling.

Leyna Tran 2D
Posts: 46
Joined: Wed Sep 30, 2020 9:37 pm
Been upvoted: 2 times

Re: Rydberg Constant

Postby Leyna Tran 2D » Fri Oct 23, 2020 9:39 am

I also think that we use 3.29 X 10^15 Hz for the rydberg constant.

Hailey Qasawadish 2J
Posts: 49
Joined: Wed Sep 30, 2020 9:36 pm
Been upvoted: 1 time

Re: Rydberg Constant

Postby Hailey Qasawadish 2J » Fri Oct 23, 2020 9:40 am

These constants are technically the same, they are just in different units. The 3.29 x 10^15 is in Hz. This would be used if you're using frequency in the problem. The other constant is in meters, and it would be used when using wavelength in the problem. Hope this helps!

Will Skinner
Posts: 29
Joined: Wed Sep 30, 2020 9:28 pm

Re: Rydberg Constant

Postby Will Skinner » Fri Oct 23, 2020 11:45 am

Both are correct, but that equation takes R in Hz.

Mahika More 1H
Posts: 41
Joined: Wed Sep 30, 2020 9:34 pm
Been upvoted: 2 times

Re: Rydberg Constant

Postby Mahika More 1H » Fri Oct 23, 2020 11:48 am

Since they are in different units, you can just check your units to see which one to use. Most commonly the value in Hz is used.

Jasraj Parmar 3H
Posts: 49
Joined: Wed Sep 30, 2020 9:44 pm

Re: Rydberg Constant

Postby Jasraj Parmar 3H » Fri Oct 23, 2020 11:58 am

I think you use 3.29 x 10^ 15 as the Rydberg Constant for Hz.

Chem_Mod
Posts: 18879
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 714 times

Re: Rydberg Constant

Postby Chem_Mod » Fri Oct 23, 2020 12:26 pm

Either can be used, just make sure your other values when using the equation have units that will match/cancel out!

Alex Benson
Posts: 20
Joined: Wed Sep 30, 2020 9:44 pm

Re: Rydberg Constant

Postby Alex Benson » Sat Oct 24, 2020 6:15 am

Both of these can be used it is just a matter of making sure that the units all cancel out!

LuveiaPangilinan 2C
Posts: 45
Joined: Wed Sep 30, 2020 9:48 pm
Been upvoted: 1 time

Re: Rydberg Constant

Postby LuveiaPangilinan 2C » Sat Oct 24, 2020 8:54 am

Both are the same it's just that the other value, R is used in Hz. Hope that helps!

Isabelle Hales 3L
Posts: 35
Joined: Wed Sep 30, 2020 9:41 pm
Been upvoted: 1 time

Re: Rydberg Constant

Postby Isabelle Hales 3L » Sat Oct 24, 2020 11:15 am

Hi! I had a question related to the Rydberg constant. I kept seeing "Rydberg constant for hydrogen" when I was looking up the value of the constant. Does the constant change depending on which element is involved?

John_Tran_1L
Posts: 38
Joined: Wed Sep 30, 2020 9:58 pm

Re: Rydberg Constant

Postby John_Tran_1L » Sat Oct 24, 2020 11:24 am

In one of Lavelle's recent lectures, I recall him using the number 3.29 X 10^15 Hz as the constant.

Andre Fabian 1G
Posts: 46
Joined: Wed Sep 30, 2020 10:03 pm
Been upvoted: 1 time

Re: Rydberg Constant

Postby Andre Fabian 1G » Sat Oct 24, 2020 10:08 pm

Both are correct, but you would use either depending on the context. A good way to check which one to use is to make sure that the units cancel out in whichever equation you're using, or that you don't have any units leftover that wouldn't apply to the answer.



Hope this helps!
Andre

Jaden Ji 3K
Posts: 37
Joined: Wed Sep 30, 2020 9:54 pm

Re: Rydberg Constant

Postby Jaden Ji 3K » Sun Oct 25, 2020 10:05 am

Isabelle Hales 3L wrote:Hi! I had a question related to the Rydberg constant. I kept seeing "Rydberg constant for hydrogen" when I was looking up the value of the constant. Does the constant change depending on which element is involved?

I just searched a little about it, and I found that while there are different symbols for the Rydberg constant for hydrogen and the Rydberg constant for heavy atoms, the constant number never changes. I hope this helps!


Return to “Quantum Numbers and The H-Atom”

Who is online

Users browsing this forum: No registered users and 1 guest