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Chapter 19: Q5P (page 662)

Calculate the energy of one mole of photons of red light (位=700 nm).

Short Answer

Expert verified

The energy of one mole of photons of red light is1.71脳105Jmol鈭�1.

Step by step solution

01

Definition of photon

The photon is a sort of fundamental particle that acts as the quantum of the electromagnetic field, which includes electromagnetic radiation such as light and radio waves and the electromagnetic force's force carrier.

02

Determine the energy.

The energy of a single photon can be calculated by using the equation below, wherecrepresents the speed of light,h represents Planck's constant, and位represents its wavelength.

E=ch位=(3脳108ms鈭�1)(6.63脳10鈭�34m2kgs鈭�1)7脳10鈭�7m=2.84脳10鈭�19J

The energy of one mole of photons is calculated by multiplying the earlier supplied value of the energy of one photon by Avogadro's number.

E1mol=(2.84脳10鈭�19J)(6.02脳1023mol鈭�1)=1.71脳105Jmol鈭�1

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