For this problem, we have to calculate the partial pressure of NH_{3} at 621 K if an excess amount of NH_{4}ClO_{4 }is allowed to equilibrate

To do so, we have to follow the steps:

**Step 1. **Analyze the graph and determine the value of Kp

**Step 2. **Calculate the equilibrium pressure of NH_{3}

The temperature dependence of the equilibrium constant (K_{p}) is illustrated for the following reaction:

NH_{4}ClO_{4}(s) → NH_{3}(g) + HClO_{4}(g)

Note: the points are labeled as (1/T • 10^{3}, lnK_{p}).

Answer the following questions relating to the plot shown above:

Calculate the partial pressure of NH_{3} (g) at 621 K if an excess amount of NH_{4}ClO_{4} (s) is allowed to equilibrate in an evacuated closed vesel. Show all work and circle your final answer.