- The change from solid to liquid is called fusion, or melting.

- To melt 1 gram of ice requires 80 calories. (A calorie is defined as the amount of energy needed to raise one gram of water 1C.)

- The change from liquid to ice is called solidification. This process will release 80 calories per gram.

- The change from liquid to vapor is called evaporation. This process requires 600 calories.

- The opposite of evaporation is called condensation. The latent heat of condensation will release 600 calories per gram of liquid water.

- Sublimation is the process of changing vapor to a solid or from a solid to vapor (although the change from vapor to solid is sometimes called deposition). High ice clouds and dry ice are examples of sublimation.


How many calories does it take to sublimate ice (0C) to vapor (100C)?

  • From solid to liquid is 80
  • .
  • From 0 to 100 is 100
  • From liquid to vapor is 600
  • .
  • 80+100+600=780 calories

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