Degree of Dissociation Formula:
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Definition: The degree of dissociation (α) measures the fraction of molecules that dissociate into ions or smaller molecules at equilibrium.
Purpose: This calculator determines how pressure changes affect the dissociation of molecules in a chemical reaction at equilibrium.
The calculator uses the formula:
Where:
Explanation: The degree of dissociation decreases with increasing pressure, following Le Chatelier's principle.
Details: Understanding dissociation helps predict reaction behavior, equilibrium shifts, and optimize industrial chemical processes.
Tips: Enter the equilibrium constant (Kp) and the system pressure. Both values must be positive numbers.
Q1: Why does dissociation decrease with pressure?
A: According to Le Chatelier's principle, systems shift to reduce pressure increases, favoring the side with fewer gas molecules.
Q2: What's the range for degree of dissociation?
A: α ranges from 0 (no dissociation) to 1 (complete dissociation).
Q3: Does this formula work for all reactions?
A: No, it's specific for reactions where the number of gas molecules increases during dissociation.
Q4: How do I find Kp values?
A: Kp can be calculated from standard Gibbs free energy or measured experimentally.
Q5: What units should I use?
A: Use consistent units (mol/m³ for Kp and Pa for pressure) for accurate results.