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?

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

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

the dissolution of polymer can be thermodynamically described in 2 steps.