Question

Ammonia is produced synthetically by the reaction: 2Fe+3Cl2 --- 2FeCl3

- Is this an exothermic or endothermic process?
- How many moles of NH3 are formed when 1 mol of N2 reacts with hydrogen?
-If 18 x 1023 molecules of H2 react with nitrogen, how many moles of NH3 are produced?

Answer 1

Ammonia is synthetically by reaction

N2 +3H2 ---> 2NH3

(a) The process is exothermic. This is because heat is released during the formation of NH3(ammonia)

(b) The moles of NH3 formed when 1 mole of N2 reacted with hydrogen is 2 moles

by use of mole ratio between N2 to NH3 wich is 1:2 the moles of NH3 is therefor = 1 x 2/1 = 2 moles

(c) The moles of NH3 produced if 18 x10^23 molecules of H2 reacted is 1.993 moles of NH3

calculation

by use of Avogadro law constant calculate the moles of H2 reacted

1 mole = 6.02 x 10^23 molecules

? = 18 x10 ^23 molecules

by cross multiplication

= 1 mole x 18 x10 ^23 / 6.02 x10^23 = 2.99moles of H2

by use of mole ratio of H2 : NH3 which is 3:2 the moles of NH3 is therefore= 2.99 x/3=1.993 moles