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Use the reaction and bond information to answer the question.

H2 + CO2 → CH2O2

Reactant bond energies: H–H is 432 kJ/mol, C=O is 799 kJ/mol

Product bond energies: C–H is 413 kJ/mol, C=O is 745 kJ/mol, C–O is 358 kJ/mol, O–H is 467 kJ/mol

How much energy must this system absorb before the reaction can begin?


2,030 kJ

2,462 kJ

1,231 kJ

1,663 kJ

Respuesta :

As

[tex]\\ \bull\sf\dashrightarrow \Delta H=+ve[/tex]

[tex]\\ \bull\sf\dashrightarrow HE_1=HE_2[/tex]

Let required absorption energy is x

[tex]\\ \bull\sf\dashrightarrow (432+799+x=413+745+358+467)[/tex]

[tex]\\ \bull\sf\dashrightarrow 1231+x=1983[/tex]

But

[tex]\\ \bull\sf\dashrightarrow x-1231=0[/tex]

Hence

[tex]\\ \bull\sf\dashrightarrow x=1231KJ/mol[/tex]

Option C is correct

bigbrain69

Answer:

1 Absorbed

2 O=O

3 2,030 kJ

4 Yes, it would occur without additional energy because the reaction is exothermic.

5 The reaction is endothermic, because stronger bonds are broken than formed.

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