Physics 312 Lecture: "Calorimetry and Latent Heat"
May 3, 1998
- Calorimetry carefully measures the change in temperature
of a substance immersed in a closed chamber
- The heat gained by the chamber equals the heat lost by the substance
- One can identify substances by their specific heat capacity
- When materials undergo phase changes, they may gain or
lose lots of energy without changing temperature;
the energy goes into creating (or breaking) inter-molecular
- Each phase change of a substance has associated with it a
latent heat, which describes the amount of energy
gained (or lost) per kilogram as the material changes phase
- One must very carefully add together changes in internal
energy of material due to changes in temperature, and
due to changes in phase
This lecture discusses material in Chapter 20 of Serway.