1. What is Degree of Dissociation for Double Reaction?

Definition: The degree of dissociation (α) represents the fraction of reactant molecules that dissociate into products at equilibrium.

Purpose: This calculator determines the extent of dissociation for reactions where one molecule dissociates into two particles, considering equilibrium pressure.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \alpha \) — Degree of dissociation (unitless, between 0 and 1)
• \( K_p \) — Equilibrium constant for partial pressure (mol/m³)
• \( P_{abs} \) — Absolute pressure (Pascal)

Explanation: The formula calculates how much of the original substance has dissociated at equilibrium, considering both the equilibrium constant and the system pressure.

3. Importance of Degree of Dissociation

Details: Understanding dissociation is crucial for predicting reaction yields, equilibrium positions, and designing chemical processes.

4. Using the Calculator

Tips: Enter the equilibrium constant (K_p) in mol/m³ and absolute pressure in Pascals. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does a degree of dissociation of 0.5 mean?
A: It means 50% of the original molecules have dissociated into products at equilibrium.

Q2: How does pressure affect dissociation?
A: For reactions producing more gas molecules (like A → 2B), increased pressure typically decreases dissociation.

Q3: What's the range of possible values for α?
A: The degree of dissociation ranges from 0 (no dissociation) to 1 (complete dissociation).

Q4: Can this be used for other types of reactions?
A: This specific formula applies to 1→2 molecular dissociation. Different stoichiometry requires modified formulas.

Q5: Where can I find K_p values?
A: K_p values are typically found in chemical equilibrium tables or determined experimentally.