Question

please answer all parts of this question

Spectra of molecules in the microwave, infrared and ultraviolet regions of the electromagnetic spectrum have distinct differences. a. Sketch spectra in these three regions that show the above differences. 3. b. What physical change does the energy of a photon have on the molecules in these three regions. c. Discuss how the physical changes you mentioned in part b result in spectra in part a.

Answer 1

La Microwave · Infrared Ultrayjoler O occurs due to change Mccurs due to 10 Occurs due to change in rotational energy change in in electronic ete- level. vibrational energy level. energy level. @ 10-'cm (0.01-1 cm ₂ 10-5cm © 10-3 cm 16400-800 m (400-800 nm) 400 cm = 4000 cm3 6 Due to Rotational Vibrational en louter ellerinic energy of molecule is pagyis 0'1 ev energy is lev 10-5 ex | Bond-distarice level Physical change on bonds in a Outhe energy elecomuns molecule will be that molecule will the orbital will excit gaseous molecules will Vibrate in a randomly rotate, l different energy level liquid stale. Change in fond's length there can be change will take place so colour, 4 magnetic hаt +ел ра+ut of system incease rex 8 In wicoonove Oven 40 molecule from food colloid by coot attin) will occur.

- Electronic encogy level - Electroni'd transition Energy - Rotational transi Hon (energy level virrational fremsition Cerergy levet) Internuclear distance za