Chemical Equilibrium & van't Hoff

Module 7 · 7 of 8

⚗️Chemical Equilibrium & van't Hoff

How K depends on conditions and temperature

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How K depends on conditions and temperature

Equilibrium is where the reaction Gibbs energy is zero. ΔG = ΔG° + RT ln Q tells you which way a reaction will run from any starting mix, and the van't Hoff equation predicts how the equilibrium constant shifts with temperature.

Difficulty

advanced

Time

~35 min

Equations

Practice Qs

Learning Objectives

✓Relate ΔG° to K and predict the equilibrium position
✓Use ΔG = ΔG° + RT ln Q to predict reaction direction
✓Apply the van't Hoff equation to find K at a new temperature
✓Predict the effect of temperature using Le Chatelier and the sign of ΔH°
✓Distinguish the reaction quotient Q from the constant K

Prerequisites

Gibbs energy & spontaneityLogarithms & exponentials

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