1. What is Increased Pressure during Chemical Reaction given Degree of Dissociation?

Definition: This calculator determines the pressure increase in a chemical reaction system based on the equilibrium constant for partial pressure and the degree of dissociation.

Purpose: It helps chemists and chemical engineers understand how pressure changes relate to dissociation in chemical reactions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P \) — Pressure (Pascal)
• \( K_p \) — Equilibrium constant for partial pressure (mol/m³)
• \( \alpha \) — Degree of dissociation (unitless, between 0 and 1)

Explanation: The pressure is inversely proportional to the square of the degree of dissociation, showing how pressure increases as dissociation decreases.

3. Importance of Pressure Calculation in Chemical Reactions

Details: Understanding pressure changes is crucial for reaction vessel design, safety considerations, and predicting reaction behavior under different conditions.

4. Using the Calculator

Tips: Enter the equilibrium constant for partial pressure (must be > 0) and degree of dissociation (must be between 0 and 1).

5. Frequently Asked Questions (FAQ)

Q1: What is degree of dissociation?
A: It's the fraction of reactant molecules that dissociate into products at equilibrium.

Q2: Why is pressure inversely related to dissociation?
A: As dissociation increases, more gas molecules are produced, increasing pressure unless volume expands to compensate.

Q3: What units should I use for Kp?
A: The calculator expects Kp in mol/m³, but you can convert from other units if needed.

Q4: Can I use this for any chemical reaction?
A: This specifically applies to gas-phase reactions where the stoichiometry gives the squared relationship shown.

Q5: What if my degree of dissociation is very small?
A: Very small α values will result in very large pressure values, which may indicate the reaction barely proceeds.