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| WK | LSN | TOPIC | SUB-TOPIC | OBJECTIVES | T/L ACTIVITIES | T/L AIDS | REFERENCE | REMARKS |
|---|---|---|---|---|---|---|---|---|
| 2 | 1 |
GAS LAWS
|
Boyle's Law - Introduction and Experimental Investigation
|
By the end of the
lesson, the learner
should be able to:
State Boyle's law Explain Boyle's law using kinetic theory of matter Investigate the relationship between pressure and volume of a fixed mass of gas Plot graphs to illustrate Boyle's law |
Teacher demonstration: Use bicycle pump to show volume-pressure relationship. Students observe force needed to compress gas. Q/A: Review kinetic theory. Class experiment: Investigate pressure-volume relationship using syringes. Record observations in table format. Discuss observations using kinetic theory.
|
Bicycle pump, Syringes, Gas jars, Chart showing volume-pressure relationship
|
KLB Secondary Chemistry Form 3, Pages 1-3
|
|
| 2 | 2-3 |
GAS LAWS
|
Boyle's Law - Mathematical Expression and Graphical Representation
Boyle's Law - Numerical Problems and Applications |
By the end of the
lesson, the learner
should be able to:
Express Boyle's law mathematically Apply the equation PV = constant Plot and interpret pressure vs volume graphs Plot pressure vs 1/volume graphs Solve numerical problems involving Boyle's law Convert between different pressure units Apply Boyle's law to real-life situations Calculate volumes and pressures using P₁V₁ = P₂V₂ |
Q/A: Recall previous lesson observations. Teacher exposition: Derive P₁V₁ = P₂V₂ equation from experimental data. Students plot graphs of pressure vs volume and pressure vs 1/volume. Analyze graph shapes and interpret mathematical relationship.
Worked examples: Demonstrate step-by-step problem solving. Supervised practice: Students solve problems involving pressure and volume calculations. Convert units (mmHg, atm, Pa). Discuss applications in tire inflation, aerosol cans. Assignment: Additional practice problems. |
Graph papers, Scientific calculators, Chart showing mathematical expressions
Scientific calculators, Worked example charts, Unit conversion tables |
KLB Secondary Chemistry Form 3, Pages 3-4
KLB Secondary Chemistry Form 3, Pages 4-5 |
|
| 2 | 4 |
GAS LAWS
|
Charles's Law - Introduction and Temperature Scales
|
By the end of the
lesson, the learner
should be able to:
State Charles's law Convert temperatures between Celsius and Kelvin scales Define absolute zero temperature Explain the concept of absolute temperature |
Teacher demonstration: Flask with colored water column experiment. Q/A: Observe volume changes with temperature. Exposition: Introduce Kelvin scale and absolute zero concept. Practice: Temperature conversions between °C and K. Discuss absolute zero and ideal gas concept.
|
Round-bottomed flask, Narrow glass tube, Colored water, Rubber bung, Hot and cold water baths
|
KLB Secondary Chemistry Form 3, Pages 6-8
|
|
| 3 | 1 |
GAS LAWS
|
Charles's Law - Experimental Investigation and Mathematical Expression
|
By the end of the
lesson, the learner
should be able to:
Investigate relationship between volume and temperature Express Charles's law mathematically Plot volume vs temperature graphs Extrapolate graphs to find absolute zero |
Class experiment: Volume-temperature relationship using flask and capillary tube. Record data at different temperatures. Plot graphs: volume vs temperature (°C) and volume vs absolute temperature (K). Extrapolate graph to find absolute zero. Derive V₁/T₁ = V₂/T₂ equation.
|
Glass apparatus, Thermometers, Graph papers, Water baths at different temperatures
|
KLB Secondary Chemistry Form 3, Pages 8-10
|
|
| 3 | 2-3 |
GAS LAWS
|
Charles's Law - Numerical Problems and Applications
Combined Gas Law and Standard Conditions Introduction to Diffusion - Experimental Investigation |
By the end of the
lesson, the learner
should be able to:
Solve numerical problems using Charles's law Apply V₁/T₁ = V₂/T₂ in calculations Predict gas behavior with temperature changes Relate Charles's law to everyday phenomena Define diffusion process Investigate diffusion in liquids and gases Compare rates of diffusion in different media Explain diffusion using kinetic theory |
Worked examples: Step-by-step problem solving with temperature conversions. Supervised practice: Calculate volumes at different temperatures. Discuss applications: hot air balloons, tire pressure changes, weather balloons. Assignment: Practice problems with real-life contexts.
Class experiments: (a) KMnO₄ crystal in water - observe spreading over time. (b) Bromine vapor in gas jars - observe color distribution. (c) Ammonia gas in combustion tube with litmus paper. Record observations over time. Discuss particle movement and kinetic energy. |
Scientific calculators, Temperature conversion charts, Application examples
Scientific calculators, Combined law derivation charts, Standard conditions reference table KMnO₄ crystals, Bromine liquid, Gas jars, Combustion tube, Litmus papers, Stopwatch |
KLB Secondary Chemistry Form 3, Pages 10-12
KLB Secondary Chemistry Form 3, Pages 14-16 |
|
| 3 | 4 |
GAS LAWS
|
Rates of Diffusion - Comparative Study
|
By the end of the
lesson, the learner
should be able to:
Compare diffusion rates of different gases Investigate factors affecting diffusion rates Measure relative distances covered by diffusing gases Calculate rates of diffusion using distance and time data |
Class experiment: Ammonia and HCl diffusion in glass tube. Insert cotton wool soaked in concentrated NH₃ and HCl at opposite ends. Time the formation of white NH₄Cl ring. Measure distances covered by each gas. Calculate rates: distance/time. Compare molecular masses of NH₃ and HCl.
|
Glass tube (25cm), Cotton wool, Concentrated NH₃ and HCl, Stopwatch, Ruler, Safety equipment
|
KLB Secondary Chemistry Form 3, Pages 16-18
|
|
| 4 | 1 |
GAS LAWS
|
Graham's Law of Diffusion - Theory and Mathematical Expression
|
By the end of the
lesson, the learner
should be able to:
State Graham's law of diffusion Express Graham's law mathematically Relate diffusion rate to molecular mass and density Explain the inverse relationship between rate and √molecular mass |
Teacher exposition: Graham's law statement and mathematical derivation. Discussion: Rate ∝ 1/√density and Rate ∝ 1/√molecular mass. Derive comparative expressions for two gases. Explain relationship between density and molecular mass. Practice: Identify faster diffusing gas from molecular masses.
|
Graham's law charts, Molecular mass tables, Mathematical derivation displays
|
KLB Secondary Chemistry Form 3, Pages 18-20
|
|
| 4 | 2-3 |
GAS LAWS
|
Graham's Law of Diffusion - Theory and Mathematical Expression
Graham's Law - Numerical Applications and Problem Solving |
By the end of the
lesson, the learner
should be able to:
State Graham's law of diffusion Express Graham's law mathematically Relate diffusion rate to molecular mass and density Explain the inverse relationship between rate and √molecular mass Solve numerical problems using Graham's law Calculate relative rates of diffusion Determine molecular masses from diffusion data Compare diffusion times for equal volumes of gases |
Teacher exposition: Graham's law statement and mathematical derivation. Discussion: Rate ∝ 1/√density and Rate ∝ 1/√molecular mass. Derive comparative expressions for two gases. Explain relationship between density and molecular mass. Practice: Identify faster diffusing gas from molecular masses.
Worked examples: Calculate relative diffusion rates using √(M₂/M₁). Problems involving time comparisons for equal volumes. Calculate unknown molecular masses from rate data. Supervised practice: Various Graham's law calculations. Real-life applications: gas separation, gas masks. |
Graham's law charts, Molecular mass tables, Mathematical derivation displays
Scientific calculators, Worked example charts, Molecular mass reference tables |
KLB Secondary Chemistry Form 3, Pages 18-20
KLB Secondary Chemistry Form 3, Pages 20-22 |
|
| 4 | 4 |
GAS LAWS
|
Graham's Law - Numerical Applications and Problem Solving
|
By the end of the
lesson, the learner
should be able to:
Solve numerical problems using Graham's law Calculate relative rates of diffusion Determine molecular masses from diffusion data Compare diffusion times for equal volumes of gases |
Worked examples: Calculate relative diffusion rates using √(M₂/M₁). Problems involving time comparisons for equal volumes. Calculate unknown molecular masses from rate data. Supervised practice: Various Graham's law calculations. Real-life applications: gas separation, gas masks.
|
Scientific calculators, Worked example charts, Molecular mass reference tables
|
KLB Secondary Chemistry Form 3, Pages 20-22
|
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