1. Mr. Skirbst Physical Science Topic 08
Heat Energy
Mr. Skirbst
Physical Science
Topic 08

2. What is heat?

3. It is the energy involved in the internal motion of particles
What is heat?
It is the energy involved in the internal motion of particles

4. How does heat “move”?

5. How does heat “move”?
Heat is always transferred (moved) from areas of high energy (warm) to areas of low energy (cool)

6. 3 Types of Heat Transfer

7. 3 Types of Heat Transfer
Conduction
- transfer through direct contact (ex. hand on window)

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

9. 2. Convection – transfer through a liquid or gas
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. How is Heat Measured?
Temperature – measures the average kinetic energy (energy of motion) of molecules

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

14. What are the three (3) temperature scales?

15. What are the three (3) temperature scales?
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. What is the unit of heat?
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
What is specific heat?
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. Specific heat of WATER = 1.00 cal/goC
What is specific heat?
Specific heat of WATER = 1.00 cal/goC

26. Calculating heat energy

27. Calculating heat energy
Calorimeter – device used to measure heat gain / loss

28. Calorimeter

29. Heat Equation

30. Lab Activity