At 250°C and 1 bar, phosphorus pentachloride PCl5 partially decomposes to phosphorus trichloride PCl3 and chlorine Cl2: PCl5(g) ⇄ PCl3 (g) + Cl2(g) (1) The standard molar reaction Gibbs free energy for reaction (1) at 250°C is 8.3 kJ mol-1. 1) Calculate the equilibrium constant at 250°C. 2) Calculate the fraction of PCl5 , which has reacted at 250°C and 1 bar, where α is defined as α = substance mass of PCl5 which has reacted / substance amount of PCl5 for the reaction. It must be assumed that all gases behave as ideal gases 3) Let us assume that at the beginning of the reaction we had a mixture where the partial pressure of each of the three gases was 2 bar. In which direction will the reaction proceed?
At 250°C and 1 bar, phosphorus pentachloride PCl5 partially decomposes to phosphorus trichloride PCl3 and chlorine Cl2: PCl5(g) ⇄ PCl3 (g) + Cl2(g) (1) The standard molar reaction Gibbs free energy for reaction (1) at 250°C is 8.3 kJ mol-1. 1) Calculate the equilibrium constant at 250°C. 2) Calculate the fraction of PCl5 , which has reacted at 250°C and 1 bar, where α is defined as α = substance mass of PCl5 which has reacted / substance amount of PCl5 for the reaction. It must be assumed that all gases behave as ideal gases 3) Let us assume that at the beginning of the reaction we had a mixture where the partial pressure of each of the three gases was 2 bar. In which direction will the reaction proceed?
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter16: Thermodynamics: Directionality Of Chemical Reactions
Section: Chapter Questions
Problem 105QRT
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At 250°C and 1 bar, phosphorus pentachloride PCl5 partially decomposes to phosphorus trichloride PCl3 and chlorine Cl2:
PCl5(g) ⇄ PCl3 (g) + Cl2(g) (1)
The standard molar reaction Gibbs free energy for reaction (1) at 250°C is 8.3 kJ mol-1.
1) Calculate the equilibrium constant at 250°C.
2) Calculate the fraction of PCl5 , which has reacted at 250°C and 1 bar, where α is defined as
α = substance mass of PCl5 which has reacted / substance amount of PCl5 for the reaction.
It must be assumed that all gases behave as ideal gases
3) Let us assume that at the beginning of the reaction we had a mixture where the partial pressure of each of the three gases was 2 bar. In which direction will the reaction proceed?
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