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    The standard enthalpy change of combustion of propanoic acid is -1527.2 kJ/mol. Given that the standard enthalpy change of formation of water is -285.8kJ/mol and that of carbon dioxide is -393.5kJ/mol, calculate the standard enthalpy change of formation of propanoic acid.
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    (Original post by TJHEY12)
    The standard enthalpy change of combustion of propanoic acid is -1527.2 kJ/mol. Given that the standard enthalpy change of formation of water is -285.8kJ/mol and that of carbon dioxide is -393.5kJ/mol, calculate the standard enthalpy change of formation of propanoic acid.
    Hint:
    In an exam they don't usually announce that "this is a Hess's Law question".
 
 
 
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