Question
Asked Nov 1, 2019
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Use standard enthalpies of formation to determine ΔHorxn for:

3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g)

-133.5 KJ

Find the change in internal energy for this reaction. Enter in kJ.

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Expert Answer

Step 1

The standard enthalpy for a given reaction can be defined as the change in the change in the enthalpy for a given substance when the matter that is present in the reaction mixture gets transformed through the chemical process provided that all the reactants as well as products are present in their standard states.

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ΔΗ. - ΔΗ reactants AH products xn

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Step 2

The given chemical reaction is as follows:

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2ΗΝΟ, (ag)-NO (g) 3ΝΟ, (g)+Η,O) (S)-Η,ο() -

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Step 3

The standard enthalpy of formation of all the rea...

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NO2 (g) 33.18 kJ/mol H2O(I)-286 kJ/mol HNO (aq)-206.6 kJ/mol NO (g)-90 kJ/mol

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