1. What is Instantaneous Fractional Yield?

Definition: Instantaneous fractional yield of a product is a measure of how selective a particular reactant is in forming a particular product at a certain instant.

Purpose: It helps chemical engineers and researchers understand the efficiency of a reaction at a specific point in time.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \phi \) — Instantaneous fractional yield
• \( dP \) — Number of moles of product formed
• \( dR \) — Number of moles of reactant reacted

Explanation: The yield is calculated by dividing the moles of product formed by the moles of reactant consumed at a specific instant.

3. Importance of Instantaneous Fractional Yield

Details: This measurement is crucial for optimizing chemical reactions, understanding reaction mechanisms, and improving process efficiency.

4. Using the Calculator

Tips: Enter the number of moles of product formed and the number of moles of reactant reacted. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What does an instantaneous fractional yield of 1 mean?
A: A yield of 1 means all the reacted reactant is converted to the desired product (100% selective).

Q2: Can the yield be greater than 1?
A: Normally no, unless there's an error in measurement or the stoichiometry is different than expected.

Q3: How is this different from overall yield?
A: Instantaneous yield measures efficiency at a specific moment, while overall yield considers the entire reaction.

Q4: When would I use this calculation?
A: Useful for continuous processes, kinetic studies, and when reaction selectivity changes over time.

Q5: What factors affect instantaneous yield?
A: Temperature, pressure, catalyst activity, reactant concentration, and reaction mechanism can all affect yield.