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Problem: Use the bond energies provided to estimate ΔH°rxn for the reaction below. CH3OH(l) + 2 O2(g) → CO2(g) + 2 H2O(g)        ΔH°rxn = ? Bond                                Bond Energy (kJ/mol) C-H                                               414 C-O                                               360 C=O                                              799 O=O                                              498       O-H                                               464   a. +473 kJ b. -91 kJ c. -486 kJ d. -392 kJ e. +206 kJ

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Problem Details

Use the bond energies provided to estimate ΔH°rxn for the reaction below.

CH3OH(l) + 2 O2(g) → CO2(g) + 2 H2O(g)        ΔH°rxn = ?

Bond                                Bond Energy (kJ/mol)

C-H                                               414

C-O                                               360

C=O                                              799

O=O                                              498      

O-H                                               464

a. +473 kJ

b. -91 kJ

c. -486 kJ

d. -392 kJ

e. +206 kJ

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