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Preliminary help - balancing equations

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1. Heyy, just wondering if anyone could tell me why we write H2+1/2O2 -->H2O rather than 2H2+O2 -->2H2O and which others equation/ the rule for which it is similiar. Thankyou x
2. Both are fine. However if you want to find something like the enthalpy of formation per mole for H2O, you should balance it like the first one, as it'll give you the enthalpy per mole, not for multiple moles.
3. (Original post by alow)
Both are fine. However if you want to find something like the enthalpy of formation per mole for H2O, you should balance it like the first one, as it'll give you the enthalpy per mole, not for multiple moles.

So if I'm just balancing equations in an exam, both would be classed as the correct answer. Thankyou so much
4. (Original post by Old mango)
So if I'm just balancing equations in an exam, both would be classed as the correct answer. Thankyou so much
As long as it's stochiometrically correct, I can't see why not.
5. Thankyou

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Updated: August 24, 2016
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