Hydrogen molecule as a harmonic oscillator

  • #1

Homework Statement


The covalent bond between the two protons in the H2 molecule can be modelled by a harmonic spring with a spring constant k = 1100 N/m.

a. What is the zero point energy of the H2 molecule as a harmonic oscillator?

b. What is the energy of the first excited state?

[tex]m_{p}=1.6726*10^-27 kg[/tex]

[tex]k=1100N/m[/tex]

Homework Equations


[tex]m=\frac{m_{p}}{2}[/tex]

[tex]\omega=\sqrt{\frac{k}{m}[/tex]

[tex]E=(n+\frac{1}{2})\hbar\omega[/tex]

The Attempt at a Solution



[tex]\omega=\sqrt{\frac{1200}{8.363*10^-28}[/tex]

a. [tex]E_{0}=\frac{1}{2}\hbar\omega=6.047J*10^-20J[/tex] this is CORRECT

b. ??[tex]E_{1}=\frac{3}{2}\hbar\omega=1.814*10^-19J[/tex] ?? this is INCORRECT

i don't understand why b. is incorrect but a. is correct. i thought the only difference would be the number for n. what am i doing wrong? can anyone help please?
 
Last edited:

Answers and Replies

  • #2
Astronuc
Staff Emeritus
Science Advisor
18,983
2,328
Try using /tex instead of \tex in [\tex].
 
  • #3
Try using /tex instead of \tex in [\tex].
thanks. i don't use that coding often. it should all be fixed now
 

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