Answered: Find the energy of absorption (in J)…

Find the energy of absorption (in J) and its wavelength (in nm) when an electron is excited from n = 2 to n = 4. use exponential notation where necessary Energy = J Wavelength = nm

Chemistry for Engineering Students

4th Edition

ISBN:9781337398909

Author:Lawrence S. Brown, Tom Holme

Publisher:Lawrence S. Brown, Tom Holme

Chapter9: Energy And Chemistry

Section: Chapter Questions

Problem 9.43PAE

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Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.

Question

Find the energy of absorption (in J) and its wavelength (in nm) when an electron is excited from n = 2 to n = 4. use exponential notation where necessary Energy = J Wavelength = nm

ΔΕ = -Β
[(G)-()]
hc
λ
E
B = 2.18x10-18 J; h= 6.626x10-34 Js; c= 2.998x108
m/s

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