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For the following reaction, 5.00g of nitrogen reacts to give the enthalpy, H= -42.0 kJ mol-1 at 298K. Calculate the change in internal energy. N2(g)

For the following reaction, 5.00g of nitrogen reacts to give the enthalpy, H= -42.0 kJ mol-1 at 298K.

Calculate the change in internal energy.

N2(g) + 3H2(g) ---> 2NH3(g)

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