1. Tardigrade
  2. Question
  3. Chemistry
  4. The reaction quotient ( Q ) for the reaction: N 2( g )+3 H 2( g ) leftharpoons 2 NH 3( g ) is given by Q =([ NH 3]2/[ N 2][ H 2]3) . The reaction will proceed from right to left if :

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Q. The reaction quotient $( Q )$ for the reaction:
$N _{2}( g )+3 H _{2}( g ) \rightleftharpoons 2 NH _{3}( g )$
is given by $Q =\frac{\left[ NH _{3}\right]^{2}}{\left[ N _{2}\right]\left[ H _{2}\right]^{3}} .$ The reaction will proceed from right to left if :

AIPMTAIPMT 2003Equilibrium

Solution:

For reaction, ${{N}_{2}}(g)+3{{H}_{2}}(g)\rightleftharpoons 2N{{H}_{3}}(g)$

$Q$ (Quotient) = $\frac{{{[N{{H}_{3}}]}^{2}}}{[{{N}_{2}}]\,{{[{{H}_{2}}]}^{3}}},\Delta n=2-4=-2$

At equilibrium $Q$ is equal to ${{K}_{C}}$ but for the progress of reaction towards right side $Q > {{K}_{C}}$ where ${{K}_{C}}$ is the equilibrium constant.