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Definition: This calculator determines the equilibrium constant at a different temperature using the Van't Hoff equation.
Purpose: It helps chemists and chemical engineers predict how changing temperature affects the equilibrium position of a reaction.
The calculator uses the Van't Hoff equation:
Where:
Explanation: The equation shows how the equilibrium constant changes with temperature based on the reaction's enthalpy.
Details: Understanding how temperature affects equilibrium is crucial for reaction optimization, industrial process design, and predicting product yields.
Tips: Enter the initial equilibrium constant, heat of reaction, initial temperature, and final temperature. All temperatures must be in Kelvin.
Q1: What is the Van't Hoff equation?
A: It describes how the equilibrium constant changes with temperature for a given heat of reaction.
Q2: Why must temperature be in Kelvin?
A: The Kelvin scale is an absolute temperature scale required for thermodynamic calculations.
Q3: What does a positive heat of reaction indicate?
A: A positive ΔH means the reaction is endothermic (absorbs heat), while negative means exothermic (releases heat).
Q4: How does temperature affect equilibrium for exothermic reactions?
A: For exothermic reactions, increasing temperature decreases the equilibrium constant (shifts equilibrium toward reactants).
Q5: What assumptions does this calculation make?
A: It assumes ΔH is constant over the temperature range and ideal behavior.