Chapter 15, Problem 15.162MP

For the decomposition reaction $PC{l}_5\left(g\right)\rightleftharpoons PC{l}_3\left(g\right)+C{l}_2\left(g\right),{\text{K}}_p=381at600Kand{K}_c$ = 46.9 at 700 K.

1. Is the reaction endothermic or exothermic? Explain does your answer agree with what you would predict based on bond energies?
2. If 1.25 g of $PC{l}_5$ is introduced into an evacuated 0.500-L flask at 700 K and the decomposition reaction is allowed to reach equilibrium, what percent of the $PC{l}_5$will decompose and what will be the total pressure in the flask?
3. Write electron-dot structures for $PC{l}_{5}andPC{l}_3$ indicate whether these molecules have a dipole moment. Explain.