Partial Pressure of Reactant in Constant Volume Batch Reactor Calculator

Partial Pressure Formula:

\[ p_A = p_{A0} - \left(\frac{A}{\Delta n}\right) \times (\pi - \pi_0) \]

Initial Partial Pressure of Reactant A (p_A0):

Stoichiometric Coefficient of Reactant (A):

Net Stoichiometric Coefficient (Δn):

Total Pressure (π):

Initial Total Pressure (π₀):

Partial Pressure of Reactant A (p_A):

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1. What is Partial Pressure of Reactant in Constant Volume Batch Reactor?

Definition: This calculator determines the partial pressure of a reactant in a constant volume batch reactor based on initial conditions and stoichiometric coefficients.

Purpose: It helps chemical engineers and researchers analyze reaction kinetics and equilibrium in closed systems.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ p_A = p_{A0} - \left(\frac{A}{\Delta n}\right) \times (\pi - \pi_0) \]

Where:

\( p_A \) — Partial pressure of reactant A (Pa)
\( p_{A0} \) — Initial partial pressure of reactant A (Pa)
\( A \) — Stoichiometric coefficient of reactant
\( \Delta n \) — Net stoichiometric coefficient (products - reactants)
\( \pi \) — Total pressure (Pa)
\( \pi_0 \) — Initial total pressure (Pa)

Explanation: The formula accounts for how the reactant's partial pressure changes as the reaction progresses and total pressure changes.

3. Importance of Partial Pressure Calculation

Details: Accurate partial pressure calculations are essential for determining reaction rates, equilibrium constants, and gas-phase behavior in reactors.

4. Using the Calculator

Tips: Enter all required values in Pascals (Pa). The net stoichiometric coefficient (Δn) can be positive, negative, or zero (but cannot be zero when calculating).

5. Frequently Asked Questions (FAQ)

Q1: What is a constant volume batch reactor?
A: A closed system where reactions occur at fixed volume, causing pressure changes as the reaction progresses.

Q2: How do I determine the net stoichiometric coefficient?
A: Subtract the sum of reactant coefficients from the sum of product coefficients in the balanced equation.

Q3: What if Δn equals zero?
A: The calculation simplifies since there's no pressure change (π = π0) in this case.

Q4: Can I use different pressure units?
A: Yes, but all pressure inputs must use the same units for consistent results.

Q5: How does temperature affect this calculation?
A: Temperature changes would require additional calculations using the ideal gas law; this calculator assumes constant temperature.