Question

Calculate the threshold energy in kJ/mol of electrons in aluminum, given that the lowest frequency photon

for which the photoelectric effect is observed is 9.87 × 10 ¹⁴ Hz.

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Answer 1

Answer:

Explanation:

Answer: The threshold energy of the electrons in aluminium is 393.71 kJ/mol.

Explanation: Threshold energy is the minimum amount of energy which is required to emit a photon from a metal surface.

Mathematically,

Where,

E = Threshold energy

= Avogadro's constant =  

h = Planck's Constant =  

= Frequency of the particle =

Putting values in above equation, we get:

  (Conversion Factor: 1kJ = 1000J)