1. What is Reaction Rate in Constant Volume Batch Reactor?

Definition: This calculator determines the reaction rate in a constant volume batch reactor based on pressure change, temperature, and time interval.

Purpose: It helps chemical engineers and researchers quantify reaction kinetics in closed systems where volume remains constant.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( r \) — Reaction rate (mol/m³·s)
• \( \Delta p \) — Net partial pressure change (Pa)
• \( [R] \) — Universal gas constant (8.314 J/mol·K)
• \( T \) — Temperature (K)
• \( \Delta t \) — Time interval (s)

Explanation: The pressure change is divided by the product of the gas constant, temperature, and time interval to determine the reaction rate.

3. Importance of Reaction Rate Calculation

Details: Accurate reaction rate measurement is crucial for reactor design, process optimization, and safety assessments in chemical processes.

4. Using the Calculator

Tips: Enter the net partial pressure change in Pascals, temperature in Kelvin, and time interval in seconds. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a constant volume batch reactor?
A: It's a closed system where chemical reactions occur at constant volume, typically used for kinetic studies.

Q2: Why is temperature important in the calculation?
A: Temperature affects both reaction kinetics and gas behavior, directly influencing the pressure changes.

Q3: How do I measure the net partial pressure change?
A: Use pressure sensors to record initial and final pressures in the reactor, then calculate the difference.

Q4: What are typical units for reaction rate?
A: In SI units, reaction rate is typically expressed in moles per cubic meter per second (mol/m³·s).

Q5: Can this be used for liquid-phase reactions?
A: No, this formula is specifically for gas-phase reactions in constant volume systems.