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Heat Energy Mr. Skirbst Physical Science Topic 08.

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Presentation on theme: "Heat Energy Mr. Skirbst Physical Science Topic 08."— Presentation transcript:

1 Heat Energy Mr. Skirbst Physical Science Topic 08

2 What is heat?

3 -It is the energy involved in the internal motion of particles

4 How does heat move?

5 Heat is always transferred (moved) from areas of high energy (warm) to areas of low energy (cool)

6 3 Types of Heat Transfer

7 1.Conduction - transfer through direct contact (ex. hand on window)

8 Conductor – transfers heat well (ex. metal) Insulator – does not transfer heat well (ex. styrofoam)

9 3 Types of Heat Transfer 2. Convection – transfer through a liquid or gas (ex. boiling water or atmosphere)

10 3 Types of Heat Transfer 3. Radiation – transfer through empty space (vacuum) (ex. energy from sun, infrared rays from a fire)

11 How is Heat Measured?

12 Temperature – measures the average kinetic energy (energy of motion) of molecules

13 How is Heat Measured? Thermometer – instrument used to measure temperature

14 What are the three (3) temperature scales?

15 1. Fahrenheit – based on an ice/salt mixture and body temperature

16 What are the three (3) temperature scales? 2. Celsius – based on freezing and boiling points of water

17 What are the three (3) temperature scales? 3. Kelvin – based on absolute zero (point at which all molecular motion stops)

18 Comparisons: Boiling water Body temperature Freezing water Absolute Zero

19 What is the unit of heat?

20 Calorie – unit of heat

21 What is the unit of heat? calorie – the heat energy needed to raise the temperature of 1 gram of water 1 degree Celsius

22 What is specific heat?

23 Specific heat – ability of a substance to absorb heat energy

24 What is specific heat? Specific heat – number of calories needed to raise the temperature of 1 gram of water 1 degree Celsius

25 What is specific heat? Specific heat of WATER = 1.00 cal/g o C

26 Calculating heat energy

27 Calorimeter – device used to measure heat gain / loss

28 Calorimeter

29 Heat Equation

30 Lab Activity

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