In which one of the following the increase of presure favours the back

1.	In which one of the following the increase of presure favours the backward reaction?
Answer» Formation of EQUILIBRIUM ammonia from `N_(2)(g) and H_(2)(g)` Decomposition equilibrium of HI (g) to `H_(2)(g) and I_(2) (g)` Synthesis of `SO_(3)` (g) by contact process Production of 'syngas' by coal gasification Solution :(a) `N_(2) (g) + 3 H_(2) (g) hArr 2 NH_(3) (g) , n_(p) LT n_(r)` Hence, increases of pressure will favour forward reaction . (b) `2 HI (g) hArr H_(2) (g) + I_(2), n_(p) = n_(r). `Hence , presure has no effect . (c ) ` 2 SO_(2) (g) + O_(2) (g) hArr 2 SO_(3)(g), n_(p) ltn_(r).` Hence , increases of pressure will favour forward reaction . (d) `C(s)+ H_(2)O (g) hArr CO(g) + H_(2) (g) , n_(p) gt n_(r)` Hence, increase of pressure will favour BACKWARD reaction . (e) `3Fe (s) + 4H_(2)O (g) hArr Fe_(3)O_(4) (s) + 4 H_(2) (g) , n_(p) = n_(r) . ` Hence , pressure has no erffect.

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