1. Temperature
Kelvin Scale
Fahrenheit Scale
Celsius Scale

3. Important Temperatures to Remember
What is the boiling point of water?
What is the freezing point of water?
What is absolute zero?

4. Gas Laws Charles Law Boyles Law (pressure remains constant)
(Temperature remains constant)

5. Charles Law Examples As Temperature Increases Volume Increases
gas laws
As Temperature Increases Volume Increases
Pressure Remains Constant

6. Boyle’s Law As Pressure Increases Volume Decreases
Temperature remains the Same

8. Boiling point
is defined as the temperature at which the vapor pressure of a liquid is equal to the atmospheric pressure
In other words, it is the minimum temperature at which a matter which is in the liquid state gets converted to a matter in the gaseous or vapor state.

9. What is the difference between boiling and evaporation
Evaporation is vaporization that occurs at the surface of
a liquid below its boiling point.

10. In water this occurs at 100 degrees Celsius at sea level.
                                                                                                           
Boiling is vaporization that occurs when the vapor pressure can overcome the atmospheric pressure.
In water this occurs at 100 degrees Celsius at sea level.

11. So……..How does altitude affect the boiling point of water?
On a Mountain:
Altitude is higher.
Atmospheric pressure is lower.
Boiling point is lower.
Pressure cooker increases the
pressure thus raising the boiling
point. Food cooks quicker
at higher temperature

12. Phase Changes

13. What happens to a time temp graph
if the amount of liquid (water) boiled
is doubled?
What changes on a time temp graph if
two different substances are
represented?

14. Note volume of ice and water
How do you explain the
difference in volume ?
Note volume of water

15. 50 cc of ice 200 cc of water 200 J of heat
The more heat added the
quicker the liquid reached
the phase change.

16. Altitude: 0 m
200 Joules
200 cc of water
50 cc of ice
Altitude: 10,000 m
200 Joules
200 cc of water
50 cc of ice

17. Endothermic : Adding Energy
Exothermic: Loosing Energy
Endothermic : Adding Energy
Altitude: 0 m
180 Joules
200 cc of water
Altitude: 0 m
--180 Joules
200 cc of water