In which of the following reactions is the position of equilibrium not affected by an increase in pressure?
a
3Fe(s) + 4H2O(g) ⇌ Fe3O4(s) + 4H2(g)
b
2NO2(g) ⇌ N2O 4(g)
c
3H2(g) + N2(g) ⇌ 2NH3(g)
d
2SO2(g) + O2(g) ⇌ 2SO3(g)
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Obehs
1 year ago
Pressure only affects gases.
So when pressure changes, only the number of gas molecules (not solids or liquids) matters.
Look at each reaction:
Option A.
3Fe(s) + 4H₂O(g) ⇌ Fe₃O₄(s) + 4H₂(g)
Reactant gases: 4
Product gases: 4
Solids don’t count when considering pressure effects.
Since number of gas molecules is the same on both sides, increasing pressure has NO effect on equilibrium.
