Answer:

Explanation:
The chemical formula for methane is 
The chemical formula for oxygen is 
The chemical formula for carbon dioxide is 
The chemical formula for water is 
Methane burns in oxygen to give carbon dioxide and water:

The balanced equation that will ensure an equal number of each atom on the left and right-hand sides of the equation would be:

There is no answer, science is about empirical knowledge, technology is the sum of techniques, skills, methods, and processes. I do not believe that you will find a answer for that.
<span>Answer:
Enthalpy Change = (6 x -393.5) + (7 x -285.8) - (-204.6) + (19/2) 0.....???
like.. (6 x Enth CO2) + ( 7 x Enth H2O) - (Enth C6H14) + (19/2) Enth O2</span>