CH4 + O2 = CO2 + H2O | Balanced Equation (Methane Combustion Reaction)

In this video we'll balance the equation CH4 + O2 = CO2 + H2O. Visit www.Breslyn.org for video guides on balancing equations and more!
In order to balance CH4 + O2 = CO2 + H2O you'll need to watch out for two things. First, be sure to count all of the O atoms on the products (right) side of the equation. There are two with the CO2 and one with the H2O for a total of three. Second, when you balance the equation leave the O2 molecule for last. As a general rule, that makes balancing equations much easier.
To balance CH4 + O2 = CO2 + H2O you'll need to be sure to count all of atoms on each side of the chemical equation.
Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Methane + Oxygen gas.
Important tips for balancing chemical equations:
Only change the numbers in front of compounds (the coefficients).
Never change the numbers after atoms (the subscripts).
The number of each atom on both sides of the equation must be the same for the equation to be balanced.
For a complete tutorial on balancing all types of chemical equations, watch my video:
Balancing Equations in 5 Easy Steps: • How to Balance Chemica...
More Practice Balancing: • Balancing Chemical Equ...
Drawing/writing done in InkScape. Screen capture done with Camtasia Studio 4.0. Done on a Dell Dimension laptop computer with a Wacom digital tablet (Bamboo).

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[@wbreslyn]

No problem, glad the videos are helpful! --- Dr. B

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[@wbreslyn]

No problem, glad I could help! --- Dr. B

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[@wbreslyn]

Glad you like them!

[@MrSigma-sl8hm]

How can I balance the same equation, i.e. CH4+O2 -> CO2+H2O
A reply would be appreciated

[@wbreslyn]

Do you mean similar equations? This video on combustion reactions would help:
czcams.com/video/PrWtXYK8tXM/video.html
--- Dr. B

[@sunriver1036]

Are you asking why we have to balance the equation if the two substances (reactants) and the products which form are the same?

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[@wbreslyn]

You're welcome 😊

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Kind sir, I am confusion. You got only two O even though arent you supposed to add the O's together?

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Sir my answer came-
2CH4+4O2-2CO2+4H20 plz check it as this equation is also correct

[@wbreslyn]

The ratio is correct, which is the most important thing. But be careful, some instructors want the lowest ratio of coefficients like in the video.

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[@wbreslyn]

No problem! --- Dr. B

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@@wbreslyn
Dr. B, I have a doubt...in the oxygen part, the number atoms on the left hand side were 2 and in the right hand side there were 3. You have kept it as 2+1 but can we keep it directly as 3 instead? And also, to get the equation balanced, is it compulsory to multiply the particular element with 2?...your explanation was amazing though, I can understand pretty easily, thank you Dr. B!

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You're welcome! --- Dr. B

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This might help - especially about the coefficients and subscripts...
How to Balance Chemical Equations: czcams.com/video/zmdxMlb88Fs/video.html
Practice Balancing: czcams.com/video/Qci7hiBy7EQ/video.html
Coefficients & Subscripts: czcams.com/video/wGNgY2XoYPs/video.html
--- Dr. B

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Happy to help!

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[@wbreslyn]

All the best with your exams!
Here are some other videos that might be helpful as well:
How to Balance Chemical Equations: czcams.com/video/zmdxMlb88Fs/video.html
Practice Balancing: czcams.com/video/Qci7hiBy7EQ/video.html
B.org Balancing App: www.breslyn.org/chemistry/balancing/index-bal.php
Coefficients & Subscripts: czcams.com/video/wGNgY2XoYPs/video.html
--- Dr. B

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Glad to hear it! I constantly work on my diction and speed since I have many international viewers. --- Dr. B

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No problem! -- Dr. B

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This is a combustion reaction. It would also be redox.

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No problem, glad I could help with CH4! --- Dr.b

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If I'm going to balance that reaction, what coefficient should I place before CH4? is it 1?

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may I also know what is the excess reagent of that reaction?

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Excellent! I hope you find my videos helpful. --- Dr. B

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Can we reverse these reaction to produce oxygen & Methane from water & carbondyoxide

[@wbreslyn]

I would think so. Plants take CO2 and H2O and change that to sugar. It might involve a few steps and energy but it could be reversed. --- Dr. B

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Why is there a CO2 molecule forming? wouldnt methane and and oxygen make CH4 + O2 = 2H2O + C

[@wbreslyn]

It's possible if the combustion is incomplete (not enough O2). But that is more like this equation:
czcams.com/video/7qP9sAjAT9o/video.html

[@lympnhora_7461]

If the combustion is incomplete does it make it 4CH4 + 5O2 = 2CO + 2C + 8H2O?

[@wbreslyn]

As I recall there are a number of possible products for incomplete combustion. You have the one I see most often. It looks balanced correctly to me - you can check here: www.webqc.org/balance.php

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what goes in front of the ch4 and the co2

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Now that it’s balanced, how many carbon dioxide molecules are produced for every methane burned??

[@wbreslyn]

That's what the coefficients tell us and one of the main reasons we balance equations - to see the ratios between compounds. Since the coefficient in front of CH4 is one (we don't write the one, but it's there) and the coefficient in front of the CO2 is one, it is a 1:1 ratio. For every one CH4 burned we get one CO2 molecule. --- Dr. B

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Excellent, glad I could help with CH4! --- Dr. B

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Thank you! --- Dr. B

[@mohammadabsam3007]

Is coffecient added or multiply by subscript? Pls reply