1. What is Equilibrium Vapour Density?

Definition: Equilibrium Vapour Density is the density of a vapour substance during the stages of reaction at equilibrium.

Purpose: This calculator helps determine the vapour density at equilibrium when the number of moles of products at equilibrium is half.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( d \) — Equilibrium Vapour Density
• \( D \) — Initial Vapour Density
• \( \alpha \) — Degree of Dissociation (between 0 and 1)

Explanation: The formula accounts for the change in density as substances dissociate during the reaction.

3. Importance of Equilibrium Vapour Density

Details: Understanding vapour density at equilibrium is crucial for chemical reaction analysis, industrial process design, and predicting reaction outcomes.

4. Using the Calculator

Tips: Enter the initial vapour density and degree of dissociation (between 0 and 1). All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is degree of dissociation?
A: The Degree of Dissociation is the extent of generating current carrying free ions, which are dissociated from the fraction of solute at a given concentration.

Q2: What's a typical range for degree of dissociation?
A: It typically ranges between 0 (no dissociation) and 1 (complete dissociation).

Q3: How do I measure initial vapour density?
A: Initial vapour density can be measured experimentally or calculated from molecular weight and ideal gas laws.

Q4: Why does the formula have a 2 in numerator and denominator?
A: The 2 accounts for the stoichiometry when number of moles of products at equilibrium is half.

Q5: Can I use this for any chemical reaction?
A: This formula specifically applies when the number of moles of products at equilibrium is half of the initial moles.