Question

c. (i) Draw a labelled diagram of a photoelectron spectrometer. Calculate the HOMO energy (maximum electron kinetic energy) for carbon monoxide (CO) based on the photoelectron spectrum in Figure 1 below. The Helium photon energy is 21.22 eV and measured electron energy is 7.2 eV (ii) co Klnctic eoergs/ey [4 x Figure 1

Answer 1

From Einstein Equation we have,

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$\frac{1}{2}mv^{2}= E_{max}= hf-\phi$

where $\phi$ is the electron energy and hf is the photon energy

2 m1,2ーEma,-21.22-7.2-14.021