Lesson 7

Chapter 3 — Energy
This lesson
  •  Understanding Heat
  • Specific heat capacity
  • Worksheet
  • Understanding isolation
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This lesson contains 12 slides, with text slides.

time-iconLesson duration is: 45 min

Items in this lesson

Chapter 3 — Energy
This lesson
  •  Understanding Heat
  • Specific heat capacity
  • Worksheet
  • Understanding isolation

Slide 1 - Slide

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Learning goals
By the end of this lesson you will be able to:
  • Explain what heat is at a molecular level.
  • Name the unit of heat.
  • Explain what specific heat capacity is.
  • Calculate specific heat capacity.
  • Explain what isolation is in your own words.

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Understanding heat

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What is heat?

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What is heat?

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What is heat?
  •  Heat is thermal energy.
  • Heat is the internal movement of a substance at a molecular level.
  • Since heat is a form of energy the unit of heat is Joule (J).

Note: In all physical processes some amount of energy is lost in the form of heat

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Have a look at chapter 3, section 2 in the digital version of the book. Go over the part 'Experiment with a calorimeter
Specific heat Capacity

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Specific heat capacity
The amount of energy required to heat up a certain amount of a substance a certain amount of temperature

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Specific heat capacity
The amount of energy required to heat up a certain amount of a substance a certain amount of temperature
Examples:
  • You need 4,2 Joule to heat up 1 gram of water 1 ºC
  • You need 0,129 Joule to heat up 1 gram of gold 1º C

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Specific heat capacity


Q: Heat in joules (J)
c: The specific heat capacity of a s substance (J/(g•ºC)
m: The mass of a substance in grams (g)
ΔT = T end  - T start : The temperature difference (ºC)

Q=cmΔT

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Worksheet specific heat capacity

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Isolation

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