Pressure Formula:
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Definition: This calculator determines the pressure of a gas using the equilibrium constant with respect to pressure (Kp) and the degree of dissociation.
Purpose: It helps chemists and chemical engineers understand gas behavior at equilibrium and predict system pressures.
The calculator uses the formula:
Where:
Explanation: The formula relates the equilibrium pressure to the dissociation characteristics of the gas.
Details: Accurate pressure calculations are crucial for reactor design, safety assessments, and understanding chemical equilibria.
Tips: Enter the equilibrium constant (Kp) in mol/m³ and degree of dissociation (α) between 0 and 1. All values must be > 0.
Q1: What is the degree of dissociation?
A: It's the fraction of reactant molecules that dissociate into products at equilibrium.
Q2: What are typical Kp values?
A: Kp varies widely depending on the reaction and temperature, ranging from very small to very large values.
Q3: Why does the formula include (1-α²)/α²?
A: This term accounts for the relationship between dissociated and undissociated molecules at equilibrium.
Q4: What units should I use?
A: Use consistent SI units - mol/m³ for Kp and unitless for α.
Q5: Can I use this for any gas?
A: This formula applies specifically to gases that dissociate according to the equilibrium being studied.