How much energy is released when 2.50g of NH3 rxs with excess N20 given the following 2NH3+3N2O -> 4N2_3H2O; DELTA(H)=-1010KJ.

Please give work and setup :)

Look up the delta Hof values for each, then

dHrxn = (n*dHf products) - (n*dHf reactants). This dHrxn will be for 34 g NH3. For 2.5 g it will be
dHrxn x (2/34) = ?