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    Hi,
    Why when using bold enthalpies to calculate the enthalpy change of combustion are the results not classed as standard enthalpy change? And also how would you convert these values to standard enthalpy changes please.
    Thanks
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    (Original post by Farmerjj)
    Hi,
    Why when using bold enthalpies to calculate the enthalpy change of combustion are the results not classed as standard enthalpy change? And also how would you convert these values to standard enthalpy changes please.
    Thanks
    bold enthalpy :ninja:

    The standard enthalpy change is the accepted value obtained by the most accurate method using values under standard conditions.

    Bond enthalpy values are averages measured over a range of similar gaseous compounds. Thermodynamic values obtained using bond enthalpy terms are likely to be approximate.

    You cannot 'convert' one to the other.
 
 
 
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