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3 years ago

Methane reacts with oxygen in the following combustion reaction.

Chemistry

2 answers:

inna [77]3 years ago

7 0

Answer:

A. Four C–H single bonds and two O=O double bonds.

Explanation:

The chemical reaction proceeds with breaking bonds in the reacting molecules and forming new bonds in the products.

In this reaction four single bonds are broken in CH₄ and two double bonds O=O are broken in two molecules of O₂.

Also, two double bonds C=O are formed in CO₂ molecules and 4 single bonds O–H are formed in 2 molecules of H₂O (each molecule contain 2 new bonds).

So, A is the right answer.

Natali5045456 [20]3 years ago

6 0

The methane molecule undergoes oxidation and the carbon is oxidized to carbon dioxide and hydrogen to water.

In this reaction there is cleavage of four C-H bonds and two O=O bonds

there will be formation of two C=O bonds and four O-H bonds.

Overall due to more bond cleavage energy there will be evolution of energy. thus combustion is an exothermic reaction.

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zhuklara [117]

To solve this problem, we should recall that the change in enthalpy is calculated by subtracting the total enthalpy of the reactants from the total enthalpy of the products:

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You did not insert the table in this problem, therefore I will find other sources to find for the enthalpies of each compound.

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