?At \(80^{\circ} \mathrm{C}, K_{c}=1.87 \times 10^{-3}\) for the

Chapter 15, Problem 15.56

(choose chapter or problem)

At \(80^{\circ} \mathrm{C}, K_{c}=1.87 \times 10^{-3}\) for the reaction

\(\mathrm{PH}_{3} \mathrm{BCl}_{3}(s) \rightleftharpoons \mathrm{PH}_{3}(g)+\mathrm{BCl}_{3}(g)\)

(a) Calculate the equilibrium concentrations of \(\mathrm{PH}_{3}\) and \(\mathrm{BCl}_{3}\) if a solid sample of \(\mathrm{PH}_{3} \mathrm{BCl}_{3}\) is placed in a closed vessel at \(80^{\circ} \mathrm{C}\) and decomposes until equilibrium is reached.

(b) If the flask has a volume of 0.250 L, what is the minimum mass of \(\mathrm{PH}_{3} \mathrm{BCl}_{3}(s)\) that must be added to the flask to achieve equilibrium?

Text Transcription:

80^circ C, K_c=1.87 \times 10^-3

PH_3 BCl_3(s) \rightleftharpoons PH_3(g)+BCl_3(g)

PH_3

BCl_3

PH_3 BCl_3

80^circ C

PH_3 BCl_3(s)