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janeilhomeblack
janeilhomeblack asked in Science & MathematicsChemistry · 6 years ago

Is the enthalpy for this reaction positive?

This is the reaction, I m trying to find the standard enthalpy at 298K

ZnO(s)+C(graphite)=Zn(s)+CO(g)

Enthalpy of formation ZnO= -350 kJ/mol,

CO=-110 kJ/mol, and O2 and Zn =0 kJ/mol

For this reaction I calculated an enthalpy of approximately +250kJ/mol, is this correct using the data provided?

Thanks

1 Answer

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  • Bobby
    Lv 7
    6 years ago
    Favorite Answer

    delta H reaction = delta H products - delta H reactants

    = - 110 - (-350) = +240 kJ/ mol

    I agree with your answer ..yes it is positive ..

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