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5.1 - States of matter

5.1.1 Describe and compare solids, liquids and gases as the three states of matter.

The movement of particles, the attractive forces between particles and the interparticular spacing should be described. A molecular level description of what happens when evaporation, boiling, condensation, melting and freezing occur should be given. Students should understand what is meant by the term diffusion

5.1.2 Describe kinetic energy in terms of the movement of particles whose average energy is proportional to absolute temperature

Kinetic energy should be interpreted in terms of ideal gases consisting of point masses in random motion whose energy is proportional to absolute temperature. Students should be able to describe what happens when the temperature is changed

5.1.3 Describe the Maxwell- Boltzmann energy distribution curve.

5.1.4 Draw and explain qualitatively the Maxwell- Boltzmann energy distribution curve for different temperatures.

5.1.5 Describe qualitatively the effects of temperature, pressure and volume changes on a fixed mass of an ideal gas.

5.1.6 State the ideal gas equation PV = nRT

5.1.7 Apply the ideal gas equation in calculations

Use the relationship between P, V, n and T for gases. Students should be familiar with P1V1/T1 = P2V2/T2 and be able to calculate molar volumes