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N(9)+3H (9) - 2NH (9) The reaction is exothermic. Suppose a mixture of N, H, and NH, has come to equilibrium in a closed reac
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This reaction is exothermic i.e. heat energy is released during the reaction.

According to Le Chateliers principle if a system at equilibrium is subjected to a stress then the system behaves in such a wtemperature is lowered -- when temperature is decreased , reaction moves in such a way so as to increase the temperature. Reaction moves forward. Equilibrium shifts towards right. Pressure of NH3 increases.

temperature is raised -- when Temperature is increased , reaction moves in such a way so as to decrease the temperature . Reaction moves in the backward direction. Equilibrium shifts towards left. The pressure of NH3 decreases.

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