Question

How much heat will be released (AH) if

0.1579 mol of NH3 are mixed with 0.20 mol of
O₂ in the following chemical reaction?
4 NH3(g) + O₂ (g) → 2 N₂H4 (g) + 2 H₂O(g)
AH = -286 kJ/mol

Answer 1

11.29 kJ (to 4 sf)

Step-by-step explanation:

Here, ammonia is the limiting reactant.

For the reaction to occur once, 4 moles of ammonia must be consumed.

Thus means that the reaction can occur 0.1579/4=0.039475 times.

Therefore, (286)(0.039475) = 11.29 kJ (to 4 sf)