A Sample of Solid NH₄NO₃ Was Placed in an Evacuated

question 40

Multiple Choice

A sample of solid NH₄NO₃ was placed in an evacuated container and then heated so that it decomposed explosively according to the following reaction:
NH₄NO₃(s)
N₂O(g) + 2H₂O(g)
At equilibrium, the total pressure in the container was found to be 2.77 atm at a temperature of 500°C. Calculate K_p.

• A) 2.77
• B) 7.67
• C) 85.0
• D) 3.15
• E) 3.41

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