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2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process?
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2 moles of PCl5 are heated in a 4 liter closed vessel at constant temp...
Understanding the Reaction
When PCl5 is heated, it can decompose into PCl3 and Cl2, following the reaction:
PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)
Given that 2 moles of PCl5 are initially present, we can analyze the situation when 55% remains undegraded.
Initial Moles
- Initial moles of PCl5 = 2 moles
- Moles of PCl5 that remain = 55% of 2 moles = 1.1 moles
- Moles of PCl5 that decomposed = 2 - 1.1 = 0.9 moles
Moles of Products at Equilibrium
- Since the decomposition produces 1 mole of PCl3 and 1 mole of Cl2 for every mole of PCl5 that decomposes:
- Moles of PCl3 = 0.9 moles
- Moles of Cl2 = 0.9 moles
Volume of the Vessel
- The volume of the closed vessel = 4 liters
Calculating Equilibrium Concentrations
- Concentration of PCl5 = 1.1 moles / 4 L = 0.275 M
- Concentration of PCl3 = 0.9 moles / 4 L = 0.225 M
- Concentration of Cl2 = 0.9 moles / 4 L = 0.225 M
Equilibrium Constant (Kc)
The expression for Kc for the reaction is given by:
Kc = [PCl3][Cl2] / [PCl5]
Substituting the equilibrium concentrations:
Kc = (0.225)(0.225) / (0.275)
Kc = 0.050625 / 0.275 = 0.183
Conclusion
Thus, the equilibrium constant Kc for the decomposition of PCl5 at the given conditions is approximately 0.183.
When PCl5 is heated, it can decompose into PCl3 and Cl2, following the reaction:
PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)
Given that 2 moles of PCl5 are initially present, we can analyze the situation when 55% remains undegraded.
Initial Moles
- Initial moles of PCl5 = 2 moles
- Moles of PCl5 that remain = 55% of 2 moles = 1.1 moles
- Moles of PCl5 that decomposed = 2 - 1.1 = 0.9 moles
Moles of Products at Equilibrium
- Since the decomposition produces 1 mole of PCl3 and 1 mole of Cl2 for every mole of PCl5 that decomposes:
- Moles of PCl3 = 0.9 moles
- Moles of Cl2 = 0.9 moles
Volume of the Vessel
- The volume of the closed vessel = 4 liters
Calculating Equilibrium Concentrations
- Concentration of PCl5 = 1.1 moles / 4 L = 0.275 M
- Concentration of PCl3 = 0.9 moles / 4 L = 0.225 M
- Concentration of Cl2 = 0.9 moles / 4 L = 0.225 M
Equilibrium Constant (Kc)
The expression for Kc for the reaction is given by:
Kc = [PCl3][Cl2] / [PCl5]
Substituting the equilibrium concentrations:
Kc = (0.225)(0.225) / (0.275)
Kc = 0.050625 / 0.275 = 0.183
Conclusion
Thus, the equilibrium constant Kc for the decomposition of PCl5 at the given conditions is approximately 0.183.
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2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process?
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2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about 2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process?.
2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about 2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for 2 moles of PCl5 are heated in a 4 liter closed vessel at constant temperature. At equilibrium 55 % of PCl5 remain undegraded. Count Kc of the process?.
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