Diploma Programme Archives - Page 15 of 40

IB DP Chemistry R2.3 L9 | Equilibrium Constant and Gibbs Energy: Two Measures of Reaction Position | Lesson Walkthrough

Connect the equilibrium constant with standard Gibbs energy and use the relationship to predict reaction position.

Measure reaction rates using mass loss and gas volume, compare units and convert measurements to molar rates.

Calculate mean and instantaneous rates from graphs using gradients and tangents.

Explain successful collisions through energy and orientation, and use particle models to compare rates.

Deduce reaction orders and rate equations from experimental initial-rate data.

Use rate and concentration-time graphs to identify reaction orders and interpret half-lives.

Calculate rate constants and their units, use rate equations and assess consistency across experimental data.

Use Arrhenius plots and temperature-dependent rate constants to calculate activation energy.

Investigate concentration, pressure and surface area while identifying and controlling experimental variables.

Explain why temperature changes reaction rates, distinguishing collision frequency from the fraction of successful collisions.