I need help, please, balancing this equation.

[Arturo]

hi i need help balancing this equation.

ethanol + water <-> H₂ + acetate + H +

Ethanol fermentation acetate and calculating delta G

AND

H₂ + CO₂ <-> CH₄ + H₂O

I really tried but I can not balance them, please !!

[GrahamKemp]

You can't balance it because the fermentation of ethanol is a reaction with acetic acid to produce ethyl acetate and water.

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CH3-CH2OH + CH3-COOH = CH3COOCH2CH3 + H2O

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For the other you begin by balancing the carbon, then balance the oxygen, and finally the hydrogen.

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4 H2 + CO2 = CH4 + 2 H2O