Chapter 7 of 10All chapters
Chapter 7 of 10
Phase changes
Energy that changes nothing visible.
Latent heat
Melting and boiling absorb energy without raising temperature, because the energy goes into breaking bonds rather than speeding particles up.
- Steam burns worse than boiling water because it releases that energy on condensing.
- Sweating cools you because evaporation takes energy from your skin.
Refrigeration
A fridge cycles a fluid through evaporation inside and condensation outside, moving latent heat from the cold space to the room. The compressor supplies the work the second law demands.