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Chemistry (Enthalpy)-College

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Given that:
2Al(s)+(3/2)O2(g)--->Al2O3(s)
change in H(rxn)= -1601 kJ/mol

2Fe(s)+(3/2)O2(g)--->Fe2O3(s)
change in H(rxn)= -821 kJ/mol


Calculate the standard enthalpy change for the following reaction:
2Al(s)+Fe2O3(s)--->2Fe(s)+Al2O3(s)


_______kJ

  • Chemistry (Enthalpy)-College -

    Use equation 1 as is.
    Reverse equation 2 (change the sign) and add to equation 1. Add the delta Hs to arrive at the total delta H for the new reaction.

  • Chemistry (Enthalpy)-College -

    Thank you so much :)

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