11 Asa Chemistry States Of Matter Lessonplan

Instructional objectives

(a) state the basic assumptions of the kinetic theory as applied to an ideal gas
(b) explain qualitatively in terms of intermolecular forces and molecular size:
(i) the conditions necessary for a gas to approach ideal behaviour
(ii) the limitations of ideality at very high pressures and very low temperatures
(c) state and use the general gas equation pV= nRTin calculations, including the determination of Mr
(d) describe, using a kinetic-molecular model: the liquid state, melting, vaporisation, vapour pressure
(e) describe, in simple terms, the lattice structure of a crystalline solid which is:
(i) ionic, as in sodium chloride, magnesium oxide
(ii) simple molecular, as in iodine
(iii) giant molecular, as in silicon(IV) oxide and the graphite and diamond allotropes of carbon
(iv) hydrogen-bonded, as in ice
(v) metallic, as in copper
[the concept of the ‘unit cell’ is not required]
(f) explain the strength, high melting point and electrical insulating properties of ceramics in terms of their giant molecular structure
(g) relate the uses of ceramics, based on magnesium oxide, aluminium oxide and silicon(IV) oxide, to their properties (suitable examples include furnace linings, electrical insulators, glass, crockery)
(h) discuss the finite nature of materials as a resource and the importance of recycling processes
(i) outline the importance of hydrogen bonding to the physical properties of substances, including ice and water (for example, boiling and melting points, viscosity and surface tension)
(j) suggest from quoted physical data the type of structure and bonding present in a substance

Teaching process

  • The above concepts are dealt in detail with numericals, Interpretation of graphs etc etc

Suggested reading

Activity

  • Experimental determination of relative molecular weight of a volatile liquid
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