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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Sullivan used 578-nm light to dissociate I2 molecules to I atoms.

  1. a. What is the energy (in kJ/mol) of 578-nm light?
  2. b. Breaking an I2 bond requires 151 kJ/mol of energy. What is the longest wavelength of light that has enough energy to dissociate I2?

(a)

Interpretation Introduction

Interpretation: The energy of 578nm light has to be given.

Explanation

The energy of 578nm light is calculated as,

  Calculate energy in kJ/mol:E=hc/λ=(6.626×10-34J.s)(2.998×108m/s)/(5.78×10-7m)=3

(b)

Interpretation Introduction

Interpretation:

The longest wavelength of light that has enough energy to dissociate Iodine has to be given.

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