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Problem 8.71 Using bond enthalpies (Table 8.4 in the textbook), estimate ΔH for each of the...

Problem 8.71

Using bond enthalpies (Table 8.4 in the textbook), estimate ΔH for each of the following reactions.

Part A

2CH4(g)+O2(g)→2CH3OH(g)

ΔH =

-321

  kJ  

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Correct

Part B

H2(g)+Br2(g)→2HBr(g)

ΔH =

-103

  kJ  

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Correct

Part C

2H2O2(g)→2H2O(g)+O2(g)

ΔH =

495

  kJ  

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Incorrect; Try Again

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