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1 October, 19:13

In this thermochemical reaction, what does the coefficient ½ represent?

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  1. 1 October, 20:33
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    A thermochemical reaction is a chemical reaction with an additional information of the heat of reaction. For example, this is the thermochemical reaction for the combustion of hydrogen gas:

    H₂ (g) + 1/2 O₂ (g) → H₂O (l) ΔH = - 285.8 kJ

    The coefficient 1/2 represents the number of moles of O₂ needed to combust 1 mole of H₂ gas in order to yield one mole of water.
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