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【Daily Question】Theoretical Foundation 2019.6.26

2019-06-26View Original

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Multiple-choice question: At a certain temperature, the decomposition pressure of NH4Cl(s) is pΘ. Then the equilibrium constant KpΘ for the decomposition reaction is: (A) 1 (B) 1/2 (C) 1/4 (D) 1/8. Answer: C. At a certain temperature, the equilibrium total pressure at which a solid decomposes into gaseous products is known as the decomposition pressure of that solid. The decomposition pressure in this problem is pΘ; it can be seen that the partial pressures of the decomposition products NH3 and HCl are both (1/2) pΘ. Hint: The answer will be visible upon reply

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