Question

Use standard enthalpies of formation to determine ΔHorxnfor:
3NO2(g) + H2O(l) → 2HNO3(aq) + NO(g)

-133.5 = Delta H

Find the change in internal energy for this reactioion.. ???? In KJ
dHrxn = (n*dHreactants) - (n*dHproducts)

dE = dH + work
work is pdV but I don't see any pressure. dV you can get from 3 mols on the left going to 1 mol on the right.

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