1. What is Total Moles at Equilibrium Calculator?

Definition: This calculator determines the total moles of gas present at equilibrium based on initial vapour density, initial moles, and equilibrium vapour density.

Purpose: It helps chemists and chemical engineers analyze equilibrium conditions in reversible reactions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( M \) — Total moles at equilibrium
• \( D \) — Initial vapour density
• \( n_{initial} \) — Initial number of moles
• \( d \) — Equilibrium vapour density

Explanation: The product of initial vapour density and initial moles is divided by equilibrium vapour density to find total moles at equilibrium.

3. Importance of Equilibrium Moles Calculation

Details: Calculating equilibrium moles is crucial for understanding reaction yields, predicting product formation, and designing chemical processes.

4. Using the Calculator

Tips: Enter the initial vapour density, initial number of moles, and equilibrium vapour density. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is vapour density?
A: Vapour density is the density of a vapour relative to hydrogen gas under the same conditions.

Q2: How is initial vapour density determined?
A: It's typically measured experimentally or calculated from the molecular weight of the initial gas mixture.

Q3: Why does the number of moles change at equilibrium?
A: In reactions where the number of gas molecules changes, the total moles will differ between initial and equilibrium states.

Q4: Can this be used for liquid-phase reactions?
A: No, this calculator is specifically for gas-phase reactions where vapour density is meaningful.

Q5: What if my equilibrium density equals initial density?
A: This suggests no net reaction occurred or the reaction doesn't change the number of moles of gas.