N2+3H2 ⇌ 2NH3 ∆H=-41.02kJ/mol Forward reaction is favoured by:
Correct answer: C. Decreasing temperature.
- A. Adding NH3 at equilibrium.
- B. Adding catalyst.
- C. Decreasing temperature.
- D. Decreasing concentration of H2
Explanation
According to Le-Chatelier principle, for exothermic reaction: Yield ∝ 1/Temperature.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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