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15 Nov 2019
By using photons of specific wavelengths, chemists can dissociate gaseous HI to produce H atoms with accurately known speeds. When HI dissociates, the H atoms move away rapidly, whereas the relatively heavy I atoms move little. Use Table 9.2 in your textbook to answer the following questions: (a) What is the longest wavelength (in nm) that can dissociate a molecule of H1? (b) If a photon of 202 nm is used, what is the excess energy (in J) over that needed for the dissociation? Your response differs from the correct answer by more than 10%. Double check your calculations.) 406 nm (c) If all of this excess energy is carried away by the H atom as kinetic energy, what is its speed (in m/s)? 34464 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s Average Bond Energies (k/mol) Bond Bond Energy Bond Energy Bond Energy Single Bonds 323 Si-H Si-S H-H 432 N-H H-F 563 H-C 427 H-Br 363 H-1 295 209 N-O 20 N-C 200 Si-s 226 Si-F Si-a 381 Si-Br 310 Si- 234 S-F S-CI271 S-Br 218 S-1-170 C-H 413 N-Br 243 C-Si30 C-N 30 F-F F-C F-Br 320 213 P-H O-H467 O-P 212 C-P 264 C-Br15 C-F43 C- 339 C-Br276 Br-Br193 Br-I P-Br O-Br 234 Multiple Bonds NN 945 N-N N-O CaC839 CC614 C-N 615 C-O 745 418 607 CO1070 (799 in CO
By using photons of specific wavelengths, chemists can dissociate gaseous HI to produce H atoms with accurately known speeds. When HI dissociates, the H atoms move away rapidly, whereas the relatively heavy I atoms move little. Use Table 9.2 in your textbook to answer the following questions: (a) What is the longest wavelength (in nm) that can dissociate a molecule of H1? (b) If a photon of 202 nm is used, what is the excess energy (in J) over that needed for the dissociation? Your response differs from the correct answer by more than 10%. Double check your calculations.) 406 nm (c) If all of this excess energy is carried away by the H atom as kinetic energy, what is its speed (in m/s)? 34464 Your response differs from the correct answer by more than 10%. Double check your calculations. m/s Average Bond Energies (k/mol) Bond Bond Energy Bond Energy Bond Energy Single Bonds 323 Si-H Si-S H-H 432 N-H H-F 563 H-C 427 H-Br 363 H-1 295 209 N-O 20 N-C 200 Si-s 226 Si-F Si-a 381 Si-Br 310 Si- 234 S-F S-CI271 S-Br 218 S-1-170 C-H 413 N-Br 243 C-Si30 C-N 30 F-F F-C F-Br 320 213 P-H O-H467 O-P 212 C-P 264 C-Br15 C-F43 C- 339 C-Br276 Br-Br193 Br-I P-Br O-Br 234 Multiple Bonds NN 945 N-N N-O CaC839 CC614 C-N 615 C-O 745 418 607 CO1070 (799 in CO
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