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Change of state: melting curvesChange of state: melting curves
A
Creative Chemistry
PowerPoint Presentation
By Nigel Saunders
Copyright © 2003 Nigel Saunders, all rights reserved
Permission is granted for personal and educational use only.
Commercial copying, hiring, lending is prohibited.
Change of stateChange of state
ice → water → steam
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Draw a graph of temperature …
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
… against the length of time it has been heated
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Timewarming
ice Really cold ice from the freezer
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
melting
ice
The temperature stays the same as the ice melts
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
0°C
Pure water melts at 0°C
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
0
warming
water
The temperature goes up as the water is warmed
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
0
boiling
water
The temperature stays the same while the water boils
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
0
100°C
Pure water boils at 100°C
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
0
100
Pure water melts at 0°C and boils at 100°C
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
0
100
heating
steam
Steam can give you a far worse burn than boiling water
Change of stateChange of state
ice → water → steam
Temperature
(°C)
Time
Pure water melts at ………°C and boils at ………°C

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Meltingcurves

  • 1. Change of state: melting curvesChange of state: melting curves A Creative Chemistry PowerPoint Presentation By Nigel Saunders Copyright © 2003 Nigel Saunders, all rights reserved Permission is granted for personal and educational use only. Commercial copying, hiring, lending is prohibited.
  • 2. Change of stateChange of state ice → water → steam
  • 3. Change of stateChange of state ice → water → steam Temperature (°C) Draw a graph of temperature …
  • 4. Change of stateChange of state ice → water → steam Temperature (°C) Time … against the length of time it has been heated
  • 5. Change of stateChange of state ice → water → steam Temperature (°C) Timewarming ice Really cold ice from the freezer
  • 6. Change of stateChange of state ice → water → steam Temperature (°C) Time melting ice The temperature stays the same as the ice melts
  • 7. Change of stateChange of state ice → water → steam Temperature (°C) Time 0°C Pure water melts at 0°C
  • 8. Change of stateChange of state ice → water → steam Temperature (°C) Time 0 warming water The temperature goes up as the water is warmed
  • 9. Change of stateChange of state ice → water → steam Temperature (°C) Time 0 boiling water The temperature stays the same while the water boils
  • 10. Change of stateChange of state ice → water → steam Temperature (°C) Time 0 100°C Pure water boils at 100°C
  • 11. Change of stateChange of state ice → water → steam Temperature (°C) Time 0 100 Pure water melts at 0°C and boils at 100°C
  • 12. Change of stateChange of state ice → water → steam Temperature (°C) Time 0 100 heating steam Steam can give you a far worse burn than boiling water
  • 13. Change of stateChange of state ice → water → steam Temperature (°C) Time Pure water melts at ………°C and boils at ………°C