Use bond enthalpies to estimate the enthalpy change for the following reaction. Please Help!!?

H2O2(g)+2CO(g)→H2(g)+2CO2(g)

Answer 1

H-O-O-H + 2C≡O → H-H + 2O=C=O

Bond Enthalpies(kJ/mol) – here’s for your reference only. Use the information given in the Exam Data Booklet.

O-O = +146
H-H = +436
O-H = +464
C=O = +799
C≡O = +1072

Heat absorbed for bond breaking in reactants (H-O-O-H and 2C≡O)
= 2O-H + O-O + 2C≡O
= 2(___) + (___) + 2(___)
= x

Heat released for bond formation in products (H-H and 2O=C=O)
= H-H + 2 ( 2C=O)
= (___) + 4(____)
= y

Enthalpy change for the reaction = x – y = _______

Answer: 3218 – 3632 = -414 kJ

NOTE: The bond enthalpy always has a positive sign.

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