Energy in a body of water can be gained or lost depending on conditions. When water is heated above a certain temperature steam is generated. The increase in heat energy creates a higher level of disorder in the water molecules as they boil off and leave the liquid.
Changes of State and Free Energy
- Calculations are shown for determining entropy changes at transition temperatures (ice → water or water → vapor and reverse).
- What precautions need to be taken in selecting a value for ΔH?
- Why is temperature selection important?
- Why would the entropy of vaporization be so much larger than the entropy of fusion?