Question
Asked Oct 19, 2019
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A light photon with a frequency of at least 0.234 × 1016 Hz is required to split apart dinitrogen according to the equation:

N2(g) → 2N(g)

Calculate the energy (kJ) required to break apart a mole of dinitrogen. Express answer in scientific notation.

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Expert Answer

Step 1

Electromagnetic spectrum involves different radiations from the lowest to the highest frequency values. Some common radiations which are part of electromagnetic radiations are infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Step 2

The relation between energy and wavelength is:

hx c
Е-
h x v
Here
h- Plank's constant = 6.626 x 1034 Js
c= speed of light 3.00 x 108 m/s
= wavelength
v Frequency 0.234 x 1016 Hz
E energy
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hx c Е- h x v Here h- Plank's constant = 6.626 x 1034 Js c= speed of light 3.00 x 108 m/s = wavelength v Frequency 0.234 x 1016 Hz E energy

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Step 3

Substitute all values to calculate energy:

h= Plank’s constant = 6.626 x 10-34...

E= hx v
E 6.626 x 1034 Jxsx 0.234 x 1016 H:
E 1.550 x 1018 J
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E= hx v E 6.626 x 1034 Jxsx 0.234 x 1016 H: E 1.550 x 1018 J

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Chemical Thermodynamics

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