Total Moles at Equilibrium Formula:
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Definition: This calculator determines the total moles present at equilibrium in a chemical reaction involving dissociation, based on initial moles, degree of dissociation, and number of moles.
Purpose: It helps chemists and students understand and predict the equilibrium composition of gaseous reactions.
The calculator uses the formula:
Where:
Explanation: The formula accounts for the change in total moles due to dissociation and the stoichiometry of the reaction.
Details: Understanding equilibrium composition is crucial for reaction yield predictions, equilibrium constant calculations, and industrial process optimization.
Tips: Enter the initial moles (must be > 0), degree of dissociation (between 0-1), and number of moles (integer ≥1). The degree of dissociation represents the fraction of molecules that dissociate.
Q1: What is degree of dissociation?
A: It's the fraction of reactant molecules that dissociate into products at equilibrium (0 = no dissociation, 1 = complete dissociation).
Q2: How does number of moles affect the result?
A: More product moles from dissociation (higher N) leads to greater total moles at equilibrium for the same degree of dissociation.
Q3: What's a typical degree of dissociation?
A: It varies widely (0.001 for weak electrolytes to nearly 1 for strong acids/bases), depending on conditions.
Q4: Can this be used for any reaction?
A: Primarily for gas-phase dissociation reactions where mole numbers change. Not for reactions with no mole change.
Q5: How does temperature affect the result?
A: Temperature affects the degree of dissociation (α), which would need to be adjusted for different temperatures.