Haber's process operates at 450°C, if it is carried out at 250°C
Correct answer: D. Rate or formation will be very slow
- A. No ammonia will form.
- B. %age of NH3 will be low
- C. Catalyst would be of no use
- D. Rate or formation will be very slow
Explanation
Lowering the temperature in an exothermic reaction like Habers process reduce the rate of the reaction, as fewer reactant molecules will have the required energy to overcome the activation energy barrier. Lowering the temperature will decrease the kinetic energy of the molecules, resulting in fewer successful collisions and thus a slower reaction rate.
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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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