Which of the following statements is TRUE regarding the free energy diagram shown below?
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- Explain why the free electron model is unable to explain material systems which has an energy gap! Then, what model/theory can explain the system by energy gap?When developing the partition functions for each degree of freedom in a diatomic ideal gas, we made some approximations. Match the degree of freedom with the approximation(s) we made. Classical (energy levels are continuous) and the addition of one extra state. Classical (energy levels are continuous) no approximations excited states do not contribute significantly [Choose ] [Choose ] [Choose ] [Choose ] ♦Explain the process by which an energy dispersive X-ray spectrum (EDX) spectrum is generated and the origins of the La and Ka lines for Fe in the EDX shown in Figure 3 below. Why do the Fe La lines have a lower energy than the Ka lines? By considering the energy of the X-rays measured, discuss whether EDX can be used to measure whether the iron in an iron oxide is in 2+ or 3+ valence state? Which other spectroscopy technique in the transmission electron microscope (TEM) is more appropriate and why? OK 0.01 10.00 kev Figure 3: EDX spectrum of multi-element glass (NIST K309) containing 0, Al, Si, Ca, Ba and Fe.