CHAPTER 4 LATENT HEAT
4.1A Heating curve and Cooling curve
4.1B Specific Latent Heat Calculations
4.1C Experiments
4.1D Energy Conservation and Molecular PE
Lesson 1
Preparation - Chapter 3.1a, Chapter 3.1b
Participation - Assignment P.77 Q8, 10, 11, 12, 14, 15
Presentation - Blackboard, Student's Work
Possession
> During change of state, there is no temperature change, the heat absorbed is called latent heat.
> Latent heat of fusion (SOLID <> LIQUID), Lentant heat of vaporisation (LIQUID <> VAPOUR)
> Read from a heating curve or cooling curve the boiling point and melting point, and calcalute the specific heat capacities of solid, liquid and even vapour.
> Draw a labelled diagram of the setup to measure specific latent heat of fusion of ice. State the precautions and explain the use of the control setup.
> Draw a labelled diagram of the setup to measure specific latent heat of vaporisation of water. State the precautions. Explain the effect on the result when water splashes out, vapour condenses and drips back.
> Understand molecular PE is due to molecular attractions.
Chapter 3.1a (7:58) - 200
Chapter 3.1b (7:34) - 137
Lesson 2
Preparation - Chapter 3.1c, Chapter 3.1d
Participation - Assignment P.89 Q21, 24, 26, 31 (Optional: Q23, 34, 35)
Presentation - Blackboard, Student's Work
Possession
> During change of state, there is no temperature change, the heat absorbed is called latent heat.
> Latent heat of fusion (SOLID <> LIQUID), Lentant heat of vaporisation (LIQUID <> VAPOUR)
> Read from a heating curve or cooling curve the boiling point and melting point, and calcalute the specific heat capacities of solid, liquid and even vapour.
> Draw a labelled diagram of the setup to measure specific latent heat of fusion of ice. State the precautions and explain the use of the control setup.
> Draw a labelled diagram of the setup to measure specific latent heat of vaporisation of water. State the precautions. Explain the effect on the result when water splashes out, vapour condenses and drips back.
> Understand molecular PE is due to molecular attractions.
Chapter 3.1c (7:39) - 150
Chapter 3.1d (1:58) - 104
Preparation - Chapter 3.2a, Chapter 3.2b
Participation - Assignment P.86 Q7 10 and P.89 Q22, 23, 34, 35, 38
Presentation - Blackboard, Student's Work
Possession
> Evaporation occurs on liquid surface only (Why? and how does it happen?)
> Boiling occurs inside a liquid body, at boiling point only.
> Evaporation creates cooling effect.
> Condensation creates heating effect.
Chapter 3.2a (6:20) - 157
Chapter 3.2b (1:07) - 93
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