# Problem: A sample of solid NH4NO3 was placed in an evacuated container and then heated so that it decomposed according to the following equation and established equilibrium:NH4NO3(s) ⇌ N2O(g) + 2 H2O(g)Kp for this reaction at a certain temperature is 4.85. What is the pressure of H2O at equilibrium?A. 1.07 atm B. 2.13 atm C. 3.20 atm D. 3.73 atmE. 4.05 atm

###### FREE Expert Solution

We’re being asked to determine the pressure of H2at equilibrium given the following equilibrium reaction:

NH4NO3(s) ⇌ N2O(g) + 2 H2O(g)I; Kp = 48.5

We can use an ICE chart to establish an equation to determine the pressure of H2O. From this, we can construct an ICE table:

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###### Problem Details

A sample of solid NH4NO3 was placed in an evacuated container and then heated so that it decomposed according to the following equation and established equilibrium:

NH4NO3(s) ⇌ N2O(g) + 2 H2O(g)

Kp for this reaction at a certain temperature is 4.85. What is the pressure of H2O at equilibrium?

A. 1.07 atm

B. 2.13 atm

C. 3.20 atm

D. 3.73 atm

E. 4.05 atm