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Group 4 Chemistry

Chemistry guide

Syllabus details—AHL

Topic 17: Equilibrium (4 hours)

17.1Liquid–vapour equilibrium

2 hours

 

Assessment statement

Obj

Teacher’s notes

17.1.1

Describe the equilibrium established between a liquid and its own vapour and how it is affected by temperature changes.

2

17.1.2

Sketch graphs showing the relationship between vapour pressure and temperature and explain them in terms of the kinetic theory.

3

17.1.3

State and explain the relationship between enthalpy of vaporization, boiling point and intermolecular forces.

3

17.2The equilibrium law

2 hours

 

Assessment statement

Obj

Teacher’s notes

17.2.1

Solve homogeneous equilibrium problems using the expression for Kc.

3

The use of quadratic equations will not be assessed.