Hydrazine (N₂H₄) is used as a fuel in liquid-fueled rockets. When hydrazine reacts with oxygen gas, nitrogen gas and water vapor are produced. Write a balanced equation and use bond energies from Table 7.3 to estimate ΔH for this reaction.

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TABLE 7.3 Average Bond Energies (kJ/mol) Single Bonds N-H N-N H-H H-F H-CI H-Br H-1 C-H C-C C-N C-O C-F -CI C-Br C-I C-S 432 565 427 363 295 413 347 305 358 485 339 276 240 259 N-F N-CI N-Br N-O O-H 0-0 O-F O-CI 0-1 F-F F-CI F-Br CI-CI Cl-Br Br-Br 391 160 272 200 243 201 467 146 190 203 234 154 253 237 239 218 193 H I-CI 1-Br S-H S-F S-CI S-Bri S-S Si-Si Si-H Si-C Si-O 149 208 175 347 327 253 218 266 340 393 360 452 Multiple Bonds C=C C=C 0=0 C=O* C=0 N=O N=N N=N C=N C=N 614 839 495 745 1072 607 418 941 891 615