Calculate the enthalpy of reaction for
HCN(g) †’ H(g) + C(g) + N(g)
from enthalpies of formation (see Appendix C). Given that the C€“H bond energy is 411 kJ/mol, obtain a value for the C‰¡N bond energy. Compare your result with the value given in Table 9.5.

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TABLE 9.5 Bond Energies (in kJ/mol) Single Bonds 0 Cl Br H 432 C 41 346 N 386 305 167 O 459 358 201 142 S 363 272_ F 565 485 283 190 284 155 CI 428 327 313 218 255 249 240 Br 362 28520 217 249 216 190 226 ー 295 213 201 278 208 175 149 Multiple Bonds CーС 602 C_N 615 C-O C C 835 C N 887 C O N-N 418 N O 607 S-O (in SO2) N N 942 0- 44 S-O (in SO3) 469 745 (799 in CO2) 1072 532