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March 27, 2017

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What is the change in the internal energy of the system when 1.243 mol of NH 3(g) is formed from N 2(g) and H 2(g) at 25 degrees C and 1.0 atm?

  • chemistry - ,

    N2 + 3H2 ==> 2NH3
    delta E = q + w

    I would look up delta Hof. Then
    dHrxn = (n*dHoproducts) - (n*dHoreactants) and that will give you q.
    W is -p*delta V.
    Use PV = nRT. You know n, R, P, and T; solve for V at the end. Knowing mols formed you can calculate mols N2 and H2 initially and calculate V initially.

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